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2. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Diamond[a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and desirable as jewelry. Diamonds are such a highly traded ...

3. Diamond color - Wikipedia

   en.wikipedia.org/wiki/Diamond_color

   Poor color is usually not enough to eliminate the use of diamond as a gemstone: if other gemological characteristics of a stone are good, a low-color diamond can remain more valuable as a gem diamond than an industrial-use diamond, and can see use in diamond jewelry.

4. Gemological Institute of America - Wikipedia

   en.wikipedia.org/wiki/Gemological_Institute_of...

   Gemological Institute of America (GIA) The Gemological Institute of America (GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [1] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the ...

5. Medieval jewelry - Wikipedia

   en.wikipedia.org/wiki/Medieval_Jewelry

   Medieval jewelry. The Dunstable Swan Jewel, a livery badge in gold and ronde bosse enamel, about 1400. The Middle Ages was a period that spanned approximately 1000 years and is normally restricted to Europe and the Byzantine Empire. The material remains we have from that time, including jewelry, can vary greatly depending on the place and time ...

6. Carat (mass) - Wikipedia

   en.wikipedia.org/wiki/Carat_(mass)

   The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1][2] and soon afterwards in many countries around the world.

7. How to Sell Gold Jewelry When Prices Hit Historic High

   www.aol.com/sell-gold-jewelry-price-nears...

   Aim to get 90 to 95% of the spot price when selling gold bars or coins, and 70 to 80% of melt value for jewelry and other items. A karat is a unit of measure for the fineness of gold. For example ...