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2. Finding (jewelcrafting) - Wikipedia

   en.wikipedia.org/wiki/Finding_(jewelcrafting)

   Tuxedo stud findings, letters of the alphabet, cluster settings, metal beads and balls Plastic, fabric or metal stringing material for threading beads Findings are available in all the jewellery metals— sterling silver , plated silver , gold , niobium , titanium , aluminium , and copper .

3. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   In creating jewellery, gemstones, coins, or other precious items are often used, and they are typically set into precious metals. Platinum alloys range from 900 (90% pure) to 950 (95% pure). The silver used in jewellery is usually sterling silver, or 92.5% fine silver. In costume jewellery, stainless steel findings are sometimes used.

4. Necklace splitting problem - Wikipedia

   en.wikipedia.org/wiki/Necklace_splitting_problem

   Example of necklace splitting with k = 2 (i.e. two partners), and t = 2 (i.e. two types of beads, here 8 red and 6 green). A 2-split is shown: one partner receives the largest section, and the other receives the remaining two pieces. Necklace splitting is a picturesque name given to several related problems in combinatorics and measure theory.

5. Necklace (combinatorics) - Wikipedia

   en.wikipedia.org/wiki/Necklace_(combinatorics)

   (set partitions up to rotation and reflection) For a given set of n beads, all distinct, the number of distinct necklaces made from these beads, counting rotated necklaces as the same, is ⁠ n! / n ⁠ = (n − 1)!. This is because the beads can be linearly ordered in n! ways, and the n circular shifts of such an ordering all give the same ...

6. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   In the United States, the quality of gold-filled composite is defined by the Federal Trade Commission (FTC). If the gold layer is 10kt fineness, the minimum weight of the plated layer on an item stamped gold-filled marks according to the Federal Trade Commission (FTC) must equal at least 1 ⁄ 20th of the total weight of the item.

7. Medieval jewelry - Wikipedia

   en.wikipedia.org/wiki/Medieval_jewelry

   Ancient engraved gems were often reused among stones, which in early medieval jeweled objects were often set profusely, spaced out across surfaces, mixed with ornaments in gold. Medieval gem engraving only recaptured the full skills of classical gem engravers at the end of the period, but simpler inscriptions and motifs were sometimes added ...