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2. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.

3. Gold - Wikipedia

   en.wikipedia.org/wiki/Gold

   By 2014, the gold jewelry industry was escalating despite a dip in gold prices. Demand in the first quarter of 2014 pushed turnover to $23.7 billion according to a World Gold Council report. Gold solder is used for joining the components of gold jewelry by high-temperature hard soldering or brazing.

4. List of jewellery types - Wikipedia

   en.wikipedia.org/wiki/List_of_jewellery_types

   This list of jewellery types is a listing of most types of jewellery made. ... Prayer jewelry Japa malas; Prayer beads; Prayer rope; Rosary beads; Puzzle jewelry.

5. File:Gold Spot Price per Gram from Jan 1971 to Jan 2012.svg

   en.wikipedia.org/wiki/File:Gold_Spot_Price_per...

   Description. Gold Spot Price per Gram from Jan 1971 to Jan 2012.svg. English: This chart shows the nominal price of gold along with the price in 1971 and 2011 dollars (adjusted based on the consumer price index). The historical gold price was obtained from www.igolder.com; CPI was obtained from www.rateinflation.com.

6. 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 ...

7. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   Fineness. The fineness of a precious metal object (coin, bar, jewelry, etc.) represents the weight of fine metal therein, in proportion to the total weight which includes alloying base metals and any impurities. Alloy metals are added to increase hardness and durability of coins and jewelry, alter colors, decrease the cost per weight, or avoid ...