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Coffee-brown staining may be iron
This is all to say
UV reactivity Visible calcite fluoresces and phosphoresces faint red under 365 nm UV light
larger spheroids among the rest glow bright in UV conditions
but appears dark due to the hyalite coating
Dolomite snowflake (dolomite ps. after aragonite), twinned Epidote Coffee-brown staining may be ironLocale: Roswell, New Mexico Approx dimensions: 2. 5 x 2. 25 x 1. 5" Approx weight: 203g 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
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