New in obsidian

Article Abstract:

The properties of several forms of obsidian are discussed. Although this gem is commonly viewed as dull, an obsidian from the Jemex Mountains in New Mexico showed bright aventurescence which resulted from the presence of tiny platelets of ilmenite and hematite. Two stones have also been discovered by Dr. Jaroslav Hyrsl, and these gems contained sillimanite and indialite.

Obsidian

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Cruciform inclusions in extraterrestrial peridot

Article Abstract:

Meteorite collector Steve Arnold of Arkansas found a 1,400 pound pallasitic meteorite in Brenham Township, Kiowa County, Kansas in October 2005. It is the largest of all of the Brenham fragments, and third among the largest pallasitic meteorites ever found. The properties of the pallasitic peridot are discussed.

Discovery and exploration, Meteorites

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Petroleum and water in quartz

Article Abstract:

Quartz crystals containing inclusions are examined. These crystals contain hydrocarbon and water, which when illuminated display luminescence. Characteristics of the crystals are presented.

Electronic components, not elsewhere classified, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Quartz Crystals, Observations, Water, Composition, Hydrocarbons, Inclusions

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