gemstones
61Hope Diamond — French Blue redirects here. For the color, see French blue (color). Hope Diamond Hope Diamond in the Smithsonian Museum of Natural History Weight 45.52[1][2] …
62Cubic zirconia — A round brilliant cut cubic zirconia Cubic zirconia (or CZ) is the cubic crystalline form of zirconium dioxide (ZrO2). The synthesized material is hard, optically flawless and usually colorless, but may be made in a variety of different colors.… …
63Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …
64Natural History (Pliny) — Naturalis Historia, 1669 edition, title page. The title at the top reads: Volume I of the Natural History of Gaius Plinius Secundus. The Natural History (Latin: Naturalis Historia) is an encyclopedia published circa AD 77–79 by Pliny the… …
65Necklace — For other uses, see Necklace (disambiguation). A bead crochet necklace made from crochet lace, sterling silver, and freshwater pearls. A necklace is an article of jewellery which is worn around the neck. Necklaces are frequently formed from a… …
66Abū Rayhān Bīrūnī — Infobox Muslim scholars | era = Matthew Deal image caption = Biruni on a 1973 Iranian post stamp commemorating his one thousandth anniversary | name = Abū Rayhān Muhammad ibn Ahmad Bīrunī title= Abu Rayhan Biruni birth = 15 September 973 AD|… …
67Pearl hunting — or pearl diving refers to a now largely obsolete method of retrieving pearls from pearl oysters, freshwater pearl mussels and, on rare occasions, other nacre producing creatures, such as abalone.HistoryBefore the beginning of the 20th century,… …
68Material properties of diamond — This article addresses the material properties of diamond. For a broader discussion of diamonds, see diamond. For other uses of the word diamond, see diamond (disambiguation). Diamond An octahedral diamond crystal in matrix Gener …
69Clinohumite — Side View of a cushion cut clinohumite gemstone, 21.34 carats (4.27 g), 17.8 x 16 mm General Category Mineral …
70Estate jewelry — Vintage jewelry can range from inexpensive to highly costly, but the act of collecting such jewelry is enjoyable for enthusiasts. Periods of vintage and estate jewelry Jewelry which is termed ‘vintage’ includes many decades or eras. Each era has… …
