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Carnelian in Theophrastus (De lap., 55) and Pliny (Hist. nat., XXXVII, xxxi) derive the name of sardion the city of Sardes where, they claim, it was first found. The carnelian is a siliceous stone and a species of chalcedony. Its color is a flesh-hued red, varying from the palest flesh-color to a deep blood-red. It is of a conchoidal structure ...
Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...
In the chart below, a year which is listed within parentheses represents the year during which that mineral, rock, stone or gemstone was officially adopted as a state symbol or emblem. Table of minerals, rocks, stones and gemstones
Most varieties weak; definite in smoky quartz Streak: White Specific gravity: 2.65 constant; variable in impure varieties Melting point: Solubility: Major varieties (or Related minerals ) One way to do it: Chalcedony, Agate, Onyx, Jasper, Aventurine, Tiger's eye, Rock Crystal, Amethyst, Citrine, Rose quartz, Milk quartz (or snow quartz), Carnelian
Types of synthetic quartz include citrine, rose quartz, and amethyst. Natural occurring quartz is not rare, but is nevertheless synthetically produced as it has practical application outside of aesthetic purposes. Quartz generates an electric current when under pressure and is used in watches, clocks, and oscillators. [62]
Aqeeq, akik or aqiq (Arabic: العقيق) means quartz in Arabic, and agate in Turkish, however in the context of rings usually refers to a ring set with a chalcedony stone. Well-known types of chalcedony are carnelian, agate, and onyx.
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High quality quartz crystals are single-crystal silica with optical or electronic properties that make them suitable for hardstone carvings. The Hindu temples in South India use this semi-precious mineral for making Shiva Lingams. Sphatikam beads are made from translucent rose quartz are cut and polished as beads.
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