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Description

Microcline feldspar with smoky quartzLocale: La Mancuerna, Tatatila, Veracruz, Mexico Approx size: 12. 5" Approx weight: 15100g Microcline is a type of feldspar that forms opaque blocky geometric crystals, the groupings often resembling cities and architectural forms. The mineral is near white with parallel striations; this is called "perthitic" texture and is common in microcline, caused by the intergrowth of two varieties of feldspar. Feldspar likes to grow as twinned crystals, meaning

These slices have been polished on one side to best reveal their pattern

followed by glassy-clear quartz included with green

and imprints of crystals that have dissolved

Locale: Atlas Mountains

and galena

Don’t worry

There is additionally a cluster of calcite crystals at the entrance of the geode

Daylight fluorescence means the fluorite reacts to the UV in sunlight

" When I cleaned the specimen

Approx dimensions: 3 x 2

even using a strong 365nm UV light

The spheres are fine on this specimen