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Shefa Yamim has recovered thousands of kimberlitic indicator minerals (KIMs). Grains include ilmenite, garnet (pyrope), spinel, moissanite, sapphire, ruby, corundum, clinopyroxene,olivine, kyanite, rutile, zircon and others. The KIMs are more abundant than diamond in a deposit and are used to trace to potential source rocks of diamond. The KIMs can be analyzed to help understand their formation environment in the earth’s mantle and any relationship to possible diamond formation.
The discovery of natural moissanite grains is significant as this is an extrememly rare mineral in nature and is thought to form at very high pressure. Synthetic moissanite is currently being produced for the jewelry market, but natural moissanite has never before been available as a precious stone.
Corundum and its gem varieties sapphire and ruby are also being recovered in the Company’s samples. Some of the blue sapphire and red ruby colors are exceptional.
At its laboratory in northern Israel, Shefa Yamim records and tests all precious stones and associated minerals.. All testing procedures are recorded in the company’s database. After the material is analyzed, all mineral grains are packed and stored in special boxes, protected and preserved for future re-evaluation.
Some of the associated minerals are tested using Electron Microprobe and SEM methods at the Geological Survey of Israel, De Beers Group Africa Exploration Laboratory, and Mineral Services Laboratories (South Africa).