Dolomite snowflake (dolomite ps. after aragonite)

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Description

Dolomite snowflake (dolomite ps. after aragonite)Locale: Roswell, New Mexico Approx dimensions: 1. 5 x 1" Approx weight: 93g These unusual pseudomorphs of dolomite after aragonite have earned the name snowflake because of their hexagonal shape which is often striated to give the mineral an appearance like a chunky snowflake. Pseudomorph means the mineral initially grew as aragonite, and then through geological processes the aragonite was replaced with dolomite. The new mineral will retain the shape

best viewed in dark conditions with a strong 365nm UV light

mainly a lighter olive green with a yellow tint but with small patch where the growth turns to thin black crystals

Color zoning can be detected inside many of the fluorite crystals

The galena has formed a small flat square tabular crystal coated in overgrowth

This piece displays both well

Not all pieces were reset evenly so cracks may be offset

and a thin yellow band between

which is known for the nearby Naica locale

exposed beneath is

Approx weight: 458g

170g B 2

and partially red with hematite inclusions