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2. Black Hills gold jewelry - Wikipedia

   en.wikipedia.org/wiki/Black_Hills_gold_jewelry

   Black Hills gold jewelry depicts leaves, grape clusters and vines, and is made with alloys of gold with standard yellow gold as well as green and pink gold. [1] [2] In 1980, the 8th Circuit affirmed an injunction ruling that if a manufacturer was to call its jewelry Black Hills Gold, then it must be made in the Black Hills. [3]

3. 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 ...

4. Electrum - Wikipedia

   en.wikipedia.org/wiki/Electrum

   Electrum is a naturally occurring alloy of gold and silver, [1] [2] with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially and is also known as "green gold". [3]

5. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   A watch made from gold-filled metal. Gold-filled jewelry is jewelry composed of a solid layer of gold (typically constituting at least 5% of the item's total weight) mechanically bonded to a base of either sterling silver or some base metal. The related terms "rolled gold plate" and "gold overlay" may legally be used in some contexts if the ...

6. Gold - Wikipedia

   en.wikipedia.org/wiki/Gold

   Gold is a chemical element; it has symbol Au (from the Latin word aurum) and atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals.

7. John Hardy (jewelry) - Wikipedia

   en.wikipedia.org/wiki/John_Hardy_(jewelry)

   History. John Hardy jewelry [2] was founded in 1975 by Canadian designer-and-artist John Hardy. He visited Bali in the mid-1970s and the island's jewelry-making traditions raised his interest. [3] He began learning the techniques of the local artisans then developed his first pieces by applying new design concepts to traditional Balinese ...