Search results
Results From The WOW.Com Content Network
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.
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.
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 ...
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 ...
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]
Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements.. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [1]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
In South American folklore, the carbuncle is a small elusive animal containing a mirror, shining gemstone or riches like gold. [4] [5] The description of the carbuncle vary, some saying it looks like a firefly in the night, or like having a bivalve-like shell and maize ear shape. [4]