mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
1 item @ $25.00  

Calcite

#AH52776

Calcite

#AH52776
Availability
Sold
Size
17.5 x 16 x 6 cm - Cabinet 
Formula
CaCO3 (RRUFF)
Locality
America mine, Santa Eulalia, Chihuahua, Mexico
Tagged
carbonate

This is a large cabinet specimen purchased by Arnold Hampson in 1972 in Santa Eulalia. There are two very distinct generations of Calcite, which are called "Mariposa" (butterfly) habit. The first generation are scalenohedral crystals measuring 3 to 4cm and are covered by glitterly iron-oxides and/or Siderite. The second generation overgrows the first and are simple yellow rhombic Calcite. The first generation is highly fluorescent red, but is hard to through the oxide coatings. However, flipping the specimen over you will see the intense red patterns of growth under shortwave UV. 

It is a beautiful specimen in which the photos do not give justice. The special edition on Santa Eulalia in the Mineralogical Record describes these Calcite crystals and the Mariposa habit including a few photos. On the outer edge are two broken off crystals, which do not detract from the overall appearance. In order to extract these from the wall, it was inevitable.

Fluorescent

Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
Special Info
Fluorescent
Mineralpedia
View Calcite
On Dakota Matrix
Previously Sold Calcite
On Dakota Matrix
Other Available Calcite
WebMineral
View Calcite
Mindat
View Calcite

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2025 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map