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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.

3. Category:Types of jewellery - Wikipedia

   en.wikipedia.org/wiki/Category:Types_of_jewellery

   Fictional gemstones and jewelry (2 C, 20 P) I. Individual pendants (8 P) N. ... Gold-filled jewelry; Grill (jewelry) H. Hairpin; Hairwork; Hemp jewelry; Holbeinesque ...

4. Carbonyldiimidazole - Wikipedia

   en.wikipedia.org/wiki/Carbonyldiimidazole

   4 C 3 H 4 N 2 + C(O)Cl 2 → (C 3 H 3 N 2) 2 CO + 2 [C 3 H 3 N 2 H 2]Cl. In this conversion, the imidazole serves both as the nucleophile and the base. An alternative precursor 1-(trimethylsilyl)imidazole requires more preparative effort with the advantage that the coproduct trimethylsilyl chloride is volatile. CDI hydrolyzes readily to give ...

5. Jewels of Diana, Princess of Wales - Wikipedia

   en.wikipedia.org/wiki/Jewels_of_Diana,_Princess...

   Diana wearing a pearl necklace and pearl earrings, featuring double wire of gold with diamonds and four equidistant knots, during a visit to Washington, D.C. in June 1997 Diana, Princess of Wales , owned a collection of jewels both as a member of the British royal family and as a private individual.

6. Carat (mass) - Wikipedia

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

   Gold fineness in carats comes from carats and grains of gold in a solidus of coin. The conversion rates 1 solidus = 24 carats, 1 carat = 4 grains still stand. [16] Woolhouse's Measures, Weights and Moneys of All Nations [17] gives gold fineness in carats of 4 grains, and silver in troy pounds [17] of 12 troy ounces of 20 pennyweight each.

7. Napier Company (jewellery) - Wikipedia

   en.wikipedia.org/wiki/Napier_Company_(jewellery)

   Flask, 1925-1930. Sterling silver and cork, 9 5/8 x 4 1/2 x 1 3/16in. (24.4 x 11.4 x 3cm). Brooklyn Museum, Modernism Benefit Fund. The Napier Company is an American jewelry manufacturing company, and was one of the first modern corporations in the United States. The company is also known historically as a cutting-edge silver object ...