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A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) 'sun' and τρέπειν (trépein) 'to turn') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).
Gesenius (Thesaurus, p. 1113) translates phnynys (Job, xxviii, 18; Prov., iii, 15; viii, 11; xx, 15; xxxi, 10; Lam., iv, 7) as "red coral". However, pearl has also been interpreted to be the meaning in these passages. The coral referred to in the Bible is the precious coral (corallium rubrum), the formation of which is well known. It is a ...
Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...
[4] [5] Most gemstones are hard, but some softer minerals such as brazilianite may be used in jewelry [6] because of their color or luster or other physical properties that have aesthetic value. However, generally speaking, soft minerals are not typically used as gemstones by virtue of their brittleness and lack of durability.
A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized rugose coral, Hexagonaria percarinata. [1] Such stones were formed as a result of glaciation, in which sheets of ice plucked stones from the bedrock, grinding off their rough edges and depositing them in the northwestern (and some in the northeastern) portion of Michigan's lower peninsula.
Orbicular jasper from Madagascar. Orbicular jasper is a variety of jasper which contains variably-colored orbs or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or seed for the orbicular structure seen in this kind of jasper. [1]
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Wolf fetish with medicine bundle and heartline carved by Stuart Lasiloo; jet, turquoise, coral, shell heshi; 2" L x 1.25" H x .5" W A grouping of hand-carved Zuni fetish objects by the Zuni artist Erik Lasiloo. Zuni fetishes are small carvings made from primarily stone but also shell, fossils, and other materials by the Zuni people.