Magnesite

Article Abstract:

Magnesites, the ores of lightweight magnesium, are for collection and are not worn as jewelry, although they produce brilliant and attractive stones. Almost all crystals of magnesite are sourced from Brumado deposits in Bahia, Brazil.

Crystals

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More marialite-meionite

Article Abstract:

Scapolite gems are violet or amethystine stones that originate from the mountains of the little known region of Pamir in central Asia. Their hardness can range from 5-1/2 to 6 while their refractive indexes are between 1.54 to 1.60.

Collections and collecting, Silicate minerals, Gems, Scapolite

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Hematite

Article Abstract:

Hematite, a mineral made up of iron oxide, has commercial value as an ore and a gemstone especially in Alaska. The mineral comes in many forms. Hematite gemstones, when polished, turn out to be black with a submetallic shine.

Usage, Evaluation, Iron ores

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