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Tips For Buying Gemstones

Gemstones have been sought after and treasured throughout history. They have been found in ruins dating several thousand years. They are valued as gifts symbolizing love.

Generally, the price of any gemstone is determined by: size, cut, quality (color/clarity/treatments), and type. Here are some questions to ask about quality:

Has it been treated?

Is the stone natural or synthetic?

Are there any noticeable scratches, chips or inclusions?

Is the color even throughout the stone?

How good is the color? (Is it vivid?)

If you are buying the stones for earrings or cufflinks, are the stones well matched?
There are many ways that dealers treat gemstones. The savvy buyer asks lots of questions and hopefully tests the results. Here are some treatments to look for:
Irradiation: It is common to irradiate Aquamarine, London Blue Topaz, Emerald, and Diamond as well as other stones. This treatment brings out color and removes imperfections. Many dealers know if the stones they are selling have been irradiated. Honest ones will tell you if they are aware of the treatment.

Heat Treatment: Amethyst, Aquamarine, Ruby, Tanzanite and Topaz are often heated at high temperatures to enhance color.

Dye: This is the most common treatment used. On clear stones, dye may be visible in cracks that are darker than the rest of the stone. Sometimes dye appears as a residue that rubs off or white patches. Lapis and Rose Quartz are commonly dyed. Amethyst and Citrine are often dyed. Black Onyx is permanently dyed in normal processing.
Coatings: Jasper is often dipped in petroleum products to bring out color and to seal it. Emerald is oiled; turquoise is waxed.

Fake stones: Some dealers will try passing off fake stones instead of natural ones. There are fake stones for most gemstones on the market. Always ask what stone something is if you are not certain. Honest dealers will tell you. If a stone looks too perfect it may be fake, irradiated or dyed. I avoid Laboratory made products are known as synthetics.

Tips on buying beads:

Good sized holes (so can use a stronger thread)

Evenly shaped beads (as appropriate)

If the beads are being sold in a 16″ strand — I make sure it is 16″ — not 14″ or 15″ if possible.

Look for the best quality stone (if buying real stones)

Make sure beads are not cracked or chipped by the holes as this tears the thread

Good color (so can create harmonious necklaces and matching earrings)

Amethyst

Amethyst

Garnet

Garnet

Emerald

Emerald

Diamonds

Diamonds

Ruby

Peridot

Ruby

Aquamarine

Aquamarine

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  • Jewelry Information Center (JIC) Jewelry Information Center (JIC) is the public relations arm of the fine jewelry and watch industries. Founded as a non-profit trade association in 1946 in New York City, JIC is funded by its members (nearly 1,000 manufacturers, designers, and retailers o Jewelry Information Center (JIC) is the public relations arm of the fine jewelry and watch industries. Founded as a non-profit trade association in 1946 in New York City, JIC is funded by its members (nearly 1,000 manufacturers, designers, and retailers o
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  • Cultured Pearl Association of America The Cultured Pearl Association of America, Inc is a non profit group founded in 1957, comprised of the finest manufacturers, wholesalers, dealers and suppliers of Cultured Pearls in the United States.  Our intention is to “cultivate” awareness, interest, The Cultured Pearl Association of America, Inc is a non profit group founded in 1957, comprised of the finest manufacturers, wholesalers, dealers and suppliers of Cultured Pearls in the United States. Our intention is to “cultivate” awareness, interest,
  • American Gem Labs (AGL) American Gemological Laboratories (AGL) is an international gemstone testing facility specializing in comprehensive colored gemstone analysis. AGL provides identification reports, detailed enhancement reports, country-of-origin or provenance reports, as w American Gemological Laboratories (AGL) is an international gemstone testing facility specializing in comprehensive colored gemstone analysis. AGL provides identification reports, detailed enhancement reports, country-of-origin or provenance reports, as w
  • The World Jewellery Confederation CIBJO is an international confederation of national jewelery trade organizations. CIBJO’s purpose is to encourage harmonization, promote international cooperation in the jewelery industry, and to consider issues which concern the trade worldwide. CIBJO is an international confederation of national jewelery trade organizations. CIBJO’s purpose is to encourage harmonization, promote international cooperation in the jewelery industry, and to consider issues which concern the trade worldwide.
  • AGTA Gem Industry Guide The AGTA is recognized within the jewelry trade as the authoritative source on natural colored gemstones: “The voice of the natural colored gemstone, pearl and cultured pearl industries.” The AGTA is recognized within the jewelry trade as the authoritative source on natural colored gemstones: “The voice of the natural colored gemstone, pearl and cultured pearl industries.”
  • Gemological Institute of America (GIA) Established in 1931, GIA is the world’s largest and most respected nonprofit institute of gemological research and learning.  GIA discovers (through GIA Research), imparts (through GIA Education), and applies (through the GIA Laboratory and GIA Instrument Established in 1931, GIA is the world’s largest and most respected nonprofit institute of gemological research and learning. GIA discovers (through GIA Research), imparts (through GIA Education), and applies (through the GIA Laboratory and GIA Instrument
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  • The Silver Institute The Silver Institute is a nonprofit international association that draws its membership from across the breadth of the silver industry. This includes leading silver mining houses, refiners, bullion suppliers, manufacturers of silver products and wholesale The Silver Institute is a nonprofit international association that draws its membership from across the breadth of the silver industry. This includes leading silver mining houses, refiners, bullion suppliers, manufacturers of silver products and wholesale
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Jewelry Titans

  • Tiffany & Company The year was 1837. Charles Lewis Tiffany and his schoolmate John Young traveled from New England to New York City with an idea and a dream that were to become Tiffany & Co. While the first day of business brought a mere four dollars and 98 cents, the The year was 1837. Charles Lewis Tiffany and his schoolmate John Young traveled from New England to New York City with an idea and a dream that were to become Tiffany & Co. While the first day of business brought a mere four dollars and 98 cents, the
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  • Cartier Louis Francois Cartier the son of a powder horn maker, founded Cartier in 1847; the year his workshop master Adolphe Picard died. Cartier would take over Maitre Picard’s Jewelry shop located at 31 Rue Montorgueil, Paris. Louis Francois Cartier the son of a powder horn maker, founded Cartier in 1847; the year his workshop master Adolphe Picard died. Cartier would take over Maitre Picard’s Jewelry shop located at 31 Rue Montorgueil, Paris.
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