Advice for Buying Diamonds and Colored Gemstones

Celebrating a Special Occasion with Jewelrywhy the qualifier is being used.
Jewelry and gems, The Buying Guide4. Is the clarity acceptable, or do too many
Colorful choices in colored Gemstonesinclusions detract from the beauty of the
Important advice before you buy coloredgemstone?
gemstoneAre there any flaws, inclusions, or natural
What to ask when buying the gemstonecharacteristics in this stone that might make it
Asking the right questions is the key to knowingmore vulnerable to breakage with normal wear?
what you're getting when it comes to buyingThis is a particularly important question when
gemstones. It is also the only way you can beconsidering a colored gemstone.
sure what you are comparing when consideringWhile visible inclusions are more common in
gems from different jewelers. Be sure thecolored gems than in diamonds, and their
jeweler can answer your questions, or can getexistence has much less impact on value than
the answers for you. Then, be sure the jeweler isthey have on diamond value, value is nonetheless
willing to put the answers in writing on your bill ofreduced if the inclusions or blemishes affect the
sale. Finally, verify the facts; double check thatgemstone's durability, or are so numerous that
the stone is as represented, by having itthey mar its beauty.
examined by a qualified gemologist appraiser. InBe especially careful to ask whether or not any
this way you'll have no doubt about what you areinclusion breaks the stone's surface, since this
getting, and you'll begin to develop a solidmay weaken the gemstone, particularly if the
relationship with the jeweler from whom youimperfection is in a position normally exposed to
make the purchase, based on confidence andwear, like the top of the stone or around the
trust. And, in the event the stone is not asgirdle. This would reduce the gemstone's value
represented, you'll know in time; and have thesignificantly. On the other hand, if the flaw is in a
information you need, to get your money back.less vulnerable spot, where it can be protected by
Questions to ask when buying a diamondthe setting, it may be of minimal risk and have
You should always have very specific informationlittle effect on value.
before purchasing a fine diamond weighing oneA larger number of inclusions will usually detract
carat or more. For smaller stones, the informationnoticeably from the beauty, especially in terms of
may not be so readily available, since mostliveliness, and will also generally weaken the
jewelers don't take the time to grade themgemstone and make it more susceptible to any
precisely. An experienced jeweler, however,below or knock. Such gemstones should be
should be able to provide information regardingavoided unless the price is right and you're willing
quality for stones from a half carat and up, orto assume the risk.
offer to find it for you. Indeed, some laboratoryAlso, certain gems, as mentioned previously, are
are now providing grading reports for diamondsmore brittle than others, and may break or chip
from 0.47 carats and up.more easily, even without flaws. These
Also keep in mind that since it is not possible togemstones include opal, zircon, and some of the
grade mounted diamonds accurately, wenew and increasing ly popular gems, such as iolte
recommend that fine diamonds weighing one(water sapphire) and tanzanite. This does not
carat or more be purchased unmounted, ormean you should avoid buying them, but it does
moved from the setting and then remounted. Inmean you should give thought to how they will be
jewelry containing numerous small diamonds, theworn and how they will be set. Rings and
stones are graded before they are set andbracelets are particularly vulnerable, since they are
information may be on the sales tag. If not, it ismore susceptible to blows or knocks; brooches,
extremely difficult to know for sure what thependants, and earrings are less vulnerable.
true quality is, and much can be concealed by a5. Do you like the color? How close is the color to
setting. We recommend buying such pieces onlyits pure spectral shade? Is it too light? Too dark?
from a knowledgeable jeweler with a goodHow does the color look in different types of
reputation.lights?
Here are the basic questions to as andLearn to look at color critically. Become familiar
information that needs to be included on the bill ofwith the rarest, and most valuable, color of the
sale of your diamond:gem of your choice. But after you do this, decide
1. What is the exact carat weight? Be sure thewhat you really like, for yourself. You may prefer
stone's weight is given, not its spread.a color that might be less rare, and therefore
2. What is its color grade? And what gradingmore affordable. Be sure the color pleases you;
system was used?don't buy what you think you should buy unless
3. What is its clarity (flaw) grade? Again, ask whatyou really like it.
system was used?6. Is the color permanent?
4. What shape is it? Round, pear, marquise?This question should be asked in light of new
5. Is it well cut for this shape? How would thetreatments (such as diffusion) and also because
"make" be graded: ideal, excellent, good?color in some gemstones is prone to fading. two
6. What are the exact millimeter dimensions ofexamples are amethyst and kunzite (one of the
the stone?new and increasingly popular gems). Just which
7. Is this stone accompanied by a diamond gradingones will fade and which won't, and how long the
report or certificate? Ask for a full report.process might take, no one can know. This
Be sure to find out what system was used tophenomenon has never affected the popularity of
grade the stone. If GIA terms are used, ask ifamethyst and we see no reason for it to affect
GIA standards and methods have been applied tokunzite's popularity, but we feel the consumer
grading the stone (Diamond).should be aware of it. There is evidence that too
Be sure to get the exact millimeter dimensions ofmuch exposure to strong sunlight or intense heat
the stone; the dimensions can be approximated ifcontributes to fading in these gemstones, so we
the stone is mounted. For a round stone, be suresuggest avoiding sun and heat. It may be wise to
you are given two dimensions for the stone'swear these gems primarily for "evening" or
diameter; since most are not perfectly round, you"indoor" activities.
need the highest and lowest. For fancy shapes,7. Does the gemstone need protective setting?
get the dimensions of the length and width.The setting may be of special importance when
Always get the dimension from the table to theconsidering gemstone like tanzanite, opal, or
culet as well, that is, the depth the stone.emerald. They require a setting that will offer
Be especially careful if the diamond is being takensome protection; for example, one in which the
out on consignment, on a jeweler's memorandummain stone is surrounded by diamonds. A design in
or sale slip, or on a contingency sale. Having thewhich the gemstone is unusually exposed, such as
measurements in writing helps protect you fromin a high setting or one with open, unprotected
being accused of switching should you have tosides, would be undesirable.
return the stone for nay reason.8. Does the gemstone have a pleasing shape?
Always ask if the stone has a certificate orDoes it have a nice "personality?"
diamond grading report and, if so, make sure itThis will be determined by the cutting. Many
accompanies the stone; if you are taking thecolored gems are cut in fancy shapes, often by
stone (diamond) on approval, ask for a copy ofcustom cutters. Fine cutting can enrich the color
the report. If there is no report or certificate, findand personality, and increase the cost. However,
out who determined the color and flaw grades;with colored gems brilliance and sparkle are less
make sure the seller puts that information on theimportant than the color itself. The most critical
bill of sale, and insist that the sale be contingentconsiderations must focus on color, first and
upon the gemstone's actually having the gradesforemost. Sometimes a cutter must sacrifice
represented.brilliance in order to obtain the finest possible color.
Additional questions to help you make yourBut if the color is not rich enough or captivating
selectionenough to compensate for less brilliance, ask if
Is it large enough?the jeweler has something that is cut better and
This is a valid question and one you should beexhibits a little more sparkle. Keep in mind,
honest with yourself about. If you think thehowever, that the more brilliant gemstone may
diamond is too small, you won't feel good aboutnot have the precise color you like, and that when
wearing it. Remember that such other factors asbuying a colored gem, color is the most crucial
clarity and color can be judged several gradesfactor. Unless you find the gemstone's personality
with little visible difference, and this might enableunappealing, don't sacrifice a beautiful color for a
you to get a larger diamond. And remember thatstone with less appealing color just because it
the color and type of setting can also help youmay sparkle more. Compare, decide based upon
achieve a larger look.what you like, and what you can afford.
Does this diamond have a good make?When considering a pastel colored gem,
Does this stone have good proportion? How doremember that if it is cut too shallow (flat), it can
its proportions compare to the "ideal?"lose its appeal quickly (but only temporarily) with a
Remember, much variance can exist and aslight build up of greasy dirt on the back; the color
diamond can still be beautiful, desirable gem evenwill fade and liveliness practically disappear. This
if it does not conform to the ideal.can be immediately remedied by a good cleaning.
Nonetheless, you won't want a diamond with poor9. What are the colorless gemstones?
proportions, so if you have any question aboutIn a piece of jewelry where a colored gemstone
the diamond's brilliance and liveliness; if it looksis mounted with colorless stones to accentuate or
lifeless or dull in spots, you should ask specificallyhighlight its color, ask, "what are the colorless
about the proportioning of the cut. In addition, youstones?" Do not assume they are diamonds. They
should ask if there are any cutting faults thatmay be diamonds, zircons, man-made diamond
might make the diamond more vulnerable toimitations such as CZ or YAG, or synthetic white
shipping or breaking, as for example, anspinel (spinel is frequently used in the Orient).
extremely thin girdle would.Special tips to remember when buying a colored
Has this diamond been clarity enhanced?gemstone
Be sure to ask whether or not the diamond has- When looking at unmounted gemstones, view
been laser treated, or fracture filled. If it isthem through the side as well as from the top.
accompanied by a GIA diamond report, theAlso, turn upside down on a flat white surface so
report will indicate lasering, if present. However,they are resting on the table facet and you can
GIA won't issue a report on a fracture filledlook straight down through the stone on the table
diamond and some jewelers don't know how tofacet and you can look straight down through the
detect them. If there is no GIA diamond report,stone from the back. Look for evenness of color
be sure to ask explicitly, and get a statement inversus color zoning; shades of lighter or darker
writing that the diamond is or is not claritytones creating streaks or planes of differing color.
enhanced, whichever the case may be. Getting- Remember that color is the most important
this fact in writing may save you a big headacheconsideration. If the color is fine, the presence of
should you learn later that the diamond isflaws or inclusions doesn't detract from the
enhanced.gemstone's value as significantly as with diamonds.
Does this diamond show any fluorescence?If the overall color or beauty deter is not
If a diamond fluoresces blue when viewed inseriously affected, the presence of flaws should
daylight or under daylight type fluorescent light, itnot deter a purchase. But, conversely, flawless
will appear whiter than it really is. This can begemstones may bring a disproportionately higher
desirable quality so long as the diamond has notprice per carat due to their rarity, an larger sizes
been graded or classified incorrectly. A diamondwill also command higher prices. In pastel colored
may also fluoresce yellow, which means that ingems, or gemstones with less fine color, clarity
certain light its color could appear worse than itmay be more important.
actually is. If the diamond has a diamond grading- Be sure to check the gemstone's color in
report, any fluorescence will be indicated there. Ifseveral different types of light; a spotlight,
there is no report, and if the jeweler can't tell yousunlight, or fluorescent or lamplight, before making
whether or not the diamond exhibits fluorescence,any decision. Many gemstones change color; some
the diamond's color grade may be incorrect.just slightly, others dramatically, depending upon
Special tips when buying a diamondthe light in which they are viewed. Be sure that
Ask the jeweler to clean the diamondthe gemstone is a pleasing color in the type of
Don't hesitate to ask to have the diamondlight in which you expect to be wearing it most.
cleaned before you examine it. Cleaning willIf considering a gemstone with rich, deep color;
remove dirt, grease, or indelible purple ink. Cleaningespecially if it is for special occasions and likely to
is best done by steaming or in an ultrasonicbe worn mostly at night, be sure it doesn't turn
cleaner. Cleaning also helps to ensure that you'llblack in evening light.
see the full beauty of the diamond; diamond can- Remember to give special attention to
become very dirty just from customers handlingwear-ability. If you are considering one of the
them, and, as a result, look less brilliant andmore fragile gemstones, think about how the
sparkling than they really are.piece will be worn, where, and how frequently.
View the diamond against a dead whiteAlso, pay special attention to the setting and
backgroundwhether the gemstone is mounted in a way that
When looking at unmounted diamonds, look atwill add protection, or allow unnecessary, risky
them only against a dead-white background suchexposure to hazards.
as white blotter paper or a white business card,Get the facts on the the bill of sale
or on a grading trough. Examine the stone againstIf a colored gemstone is over one carat and
the white background so that you are looking at itexceptionally fine and expensive, make the sale
through the side, not down through the table. Tiltcontingent on verification of the facts by a
the diamond toward a good light source; daylightqualified gemologist, appraiser, or gem testing lab
fluorescent lamp is the best. If the diamondsuch as GIA or American Gemological Laboratory
shows any yellow body tint when viewed through(AGL).
the girdle, if it is not as colorless as an ice cube,Always make sure that any item you purchase is
then the diamond is not "white" or "colorless."clearly described in the bill of sale exactly as
Get the facts on a bill of salerepresented to you by the salesperson or
Ask that all the facts concerning the diamond bejeweler. For diamonds, be sure each of the 4 Cs
put on the bill of sale. These include the caratis described in writing. For colored gems, essential
weight, the color and flaw grades, the cut, andinformation also includes the following:
the dimensions. Also, be sure you obtain the- The identity of the stone or stones and
report on any "certificated" diamond, as diamondswhether or not they are genuine or synthetic, and
accompanied by laboratory reports arenot in any way a composite (Doublet, triplet).
sometimes called.- A statement that the color is natural, if it has
Verify facts a with a gemologistbeen so represented; or, in the case of sapphire,
If a diamond is one carat or larger and nota statement that the stone either is surface
accompanied by a respected laboratory report,diffused, or that it is not surface diffused.
make the sale contingent on verification of facts- A statement describing the overall color (hue,
by a qualified gemologist, gem testing lab, or thetone, intensity).
GIA. While the GIA will not estimate dollar value, it- A statement describing the overall flaw picture.
will verify color, flaw, grade, make, fluorescence,This is not always necessary with colored
weight, and other physical characteristics.gemstones. In the case of a flawless or nearly
Weight the factsflawless gemstone it is wise to note the excellent
Decide what is important to you and then weighclarity. In addition, note any unusual flaw that
the facts. Most people think color and make aremight prove useful for for identification.
the most important considerations when buying a- A statement describing the cut or make. This is
diamond, but if you want a larger diamond, younot always necessary, but may be useful if the
may have to come down several grades in color,gemstone specially well cut, or an unusual or
or choose a slightly spread stone, or select one offancy cut.
the new shapes that look much larger than- The carat weight of the main gemstone or
traditional cuts. The most important thing is togemstones plus total weight if there is a
know what you are getting, and get what youcombination of main and smaller gemstones.
pay for.- If the gemstone is to be taken on approval,
What to ask when buying a colored gemstonemake sure that the exact dimensions of the
As with diamonds, it's very important to ask thegemstone are included, as well as any other
right questions to help you understand theidentification characteristics. The terms and period
differences in gems you may be considering.of approval should also be clearly stated.
Asking the following questions should help you toOther information that should be included for
gain a greater understanding of the differences,jewelry
determine what's right for you, and have greater- If the piece is being represented as being made
confidence in your decision.by a famous designer or house (Van Cleef and
1. Is this a genuine, natural gemstone, or aArpels, Tiffany, Caldwell, Cartier, etc.) and the
synthetic?price reflects this, the name of the designer or
Synthetic stones are genuine, but not natural.jewelry firm should be stated on the bill of sale.
2. Is the color natural?- If the piece is represented as antique
Most colored gemstones are routinely color(technically, an antique must be at least a hundred
enhanced. However, gemstones such as lapisyears old) or as a "period" piece from a popular,
should not be, and you must protect yourselfcollectible period like Art Deco, Art Nouveau,
from buying dyed material that will not retain itsEdwardian (especially if made by a premier artisan
color permanently.of the period), this information should be stated
Be especially cautious when buying any blueon the bill of sale, with the approximate age or
sapphire; make sure you ask whether or not thedate of manufacture, and a statement describing
gemstone has been checked for diffusion"condition."
treatment. Today, with diffused sapphire being- If made by hand, or custom designed, this
found mixed in parcels of natural sapphires andshould be indicated on the bill of sale.
unknowingly set into jewelry, it's possible that one- If the piece is to be taken on approval, make
may be sold inadvertently.sure millimeter dimensions; top to bottom, as well
3. Clarify what the name means.as a full description of the piece. Also, check that
Be particularly careful of misleading names. whena time period is indicated, such as "two days," and
a gemstone is described with any qualifier such asbefore you sign anything, be sure that you are
Rio Topaz (which is not topaz), ask specificallysigning an approval form and not a binding
whether or not the gemstone is genuine. Askcontract for its purchase.