Opal

Specimen ID: 15G-RRP

Mineral(s)
Opal : SiO2·nH2O
Locality
As recorded:
San Luis Potosi, Mexico
Mindat locality:
Dimensions
33mm x 28mm x 28mm
Description
A noteworthy large thumbnail / toenail specimen of this beautiful newly discovered material This has a dramatic formation of Opal with graceful, smooth â??ridgesâ? of tightly packed glass-like â??beadsâ? of Hyalite which can be seen on all sides of the piece. The specimen doesnâ??t look like a mineral because of the almost organic nature of its shape. Secondly, the color is very attractrive as it shows the distinctive â??Blood Vessel Opalâ? appearance with small areas of red-orange inclusions of iron oxide which have manifested in thin â??capillaryâ?-esque lines below the surface of the Opal. Lastly, there is a small opaque white layer of Precious Opal that can be seen in the center and back of the piece giving it a pleasing overall presence. This one is lovely and eye-catching, and a nearly damage free all the way around. One could display the piece from a few angles as well. A tiny bit of attached matrix at the base makes for a great touch as well.
Previous data
Mineral(s)
Name withheld

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