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Because diamond was unknown prior to the Roman period, and because of the similarity between the words smiris, the Egyptian asmir "emery", a grade of corundum used to polish gemstones, the Hebrew word shamir may be corundum, which exhibits the same qualities, and is used in India for the same purposes as the diamond.
Eclogites are defined as bi-mineralic, broadly basaltic rocks which have been classified into Groups A, B and C based on the chemistry of their primary mineral phases, garnet and clinopyroxene. [3] [4] The classification distinguishes each group based on the jadeite content of clinopyroxene and pyrope in garnet. [4]
Garnet sand is a good abrasive, and a common replacement for silica sand in sand blasting. Alluvial garnet grains which are rounder are more suitable for such blasting treatments. Mixed with very high pressure water, garnet is used to cut steel and other materials in water jets. For water jet cutting, garnet extracted from hard rock is suitable ...
Uvarovite is a chromium-bearing garnet group species with the formula: Ca 3 Cr 2 (Si O 4) 3. It was discovered in 1832 by Germain Henri Hess who named it after Count Sergei Uvarov (1765–1855), a Russian statesman and amateur mineral collector. [2] It is classified in the ugrandite group alongside the other calcium-bearing garnets andradite ...
The use of stone vessels made from soft limestone/chalkstone among Jews during the Second Temple period and beyond was widespread across Judea, Galilee and the Golan Heights. Initially appearing in the early 1st century BCE, these vessels continued to be utilized in each region for differing lengths of time.
Garnet lherzolite is a major constituent of the Earth's upper mantle (extending to ~300 km depth). Lherzolite is known from the lower ultramafic part of ophiolite complexes (although harzburgite is more common in this setting), from alpine-type peridotite massifs, from fracture zones adjacent to mid-oceanic ridges , and as xenoliths in ...
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Andradite is a mineral species of the garnet group.It is a nesosilicate, with formula Ca 3 Fe 2 Si 3 O 12.. Andradite includes three varieties: Colophonite: a historical variety found in the Scandinavian islands, brownish or reddish in color, often opaque or translucent.