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Description

Microcline with smoky quartz crystalsLocale: Tatatila, Veracruz, Mexico Approx dimensions: 3. 5 x 2. 5 x 2" Approx weight: 515g (1. 15 lb) Microcline is a type of feldspar forming sculptural blocky, tabular crystals which can display parallel growth and twinning. This piece has large, well formed crystals. It is opaque and near white with a pearlescent sheen. Smoky quartz commonly accompanies this material, providing a dramatic contrast. The specimen is dotted with small smoky crystals,

Handle this specimen by the heavy base to avoid damage

and a lighter reaction in the sides and base

The matrix of the specimen has also been tinted green by epidote

Approx dimensions: 3 x 2 x 1"

whereas abrasion results from improper storage (when pieces can knock or rub against each other)

the piece has been rotated to show the most off-square angle

Don’t worry though

I detected weak to moderate phosphorescence that lingers several seconds (5+ secs) after exposure to 365nm

The new mineral will retain the shape of the original growth

where there is a small raised ring with more subtle banding radiating out around it

but key to the definition is that the patterns look almost like images

Feldspar likes to grow as twinned crystals