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2. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Colored gold is the name given to any gold that has been treated using techniques to change its natural color. Pure gold is slightly reddish yellow in color, [1] but colored gold can come in a variety of different colors by alloying it with different elements. Colored golds can be classified in three groups: [2] Alloys with silver and copper in ...

3. Yogo sapphire - Wikipedia

   en.wikipedia.org/wiki/Yogo_sapphire

   When gold was discovered at Yogo Creek, Ringold sold her boarding house in Fort Benton and left for the Yogo gold fields, setting up a hotel, restaurant, and saloon in Yogo City where she sang and played music. Ringold later cooked for the English mine, but also worked her own gold claims, even after gold mining was on the decline.

4. Sapphire - Wikipedia

   en.wikipedia.org/wiki/Sapphire

   Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless. A pinkish orange variety of sapphire is called padparadscha .

5. 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 ...

6. Tanzanite - Wikipedia

   en.wikipedia.org/wiki/Tanzanite

   It was noted that "coatings in particular are not considered permanent", and in the United States are required to be disclosed at the point of sale. Pleochroism in tanzanite. Pleochroism has a physical property in which the gemstone will appear to have multiple colours based on the angle of the light hitting the stone. Tanzanite is a pleochroic ...

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 ...