Chalcedony

ChalcedonyA silicone based mineral closely related to quartz and agate, Chalcedony has a unique crystalline structure that gives it an enormously variable appearance. This mineral forms in a similar fashion to agates and geodes but due to heat and pressure at the time of formation results in a distinct look and almost silky texture. Chalcedony can be found in a range of colors but most often occurs in semitransparent or white. It has a long archaeological

Ophiuroides sp

521 million years old

Species - Scyphocrinites elegans

The effect of this is a remarkable shimmer of gold shining through the blue facets of the fluorite

These specimens of natural uncut aquamarine occur within a unique matrix of thick mica with a strong yellowish tint

large calcite crystals and the dusting of fine gold from the pyrite is unique to specimens from this specific region of China and have not been found anywhere else

Fluorite is one of the most variable of all crystalline minerals

Hyalite is usually clear but can have some color due to the presence of impurities

A vivid and richly colored copper-based mineral

40-50 million years ago

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narrow shape resembling the interior and pitched roof of a cathedral