Conichalcite
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Conichalcite (Kon-e-Kal-Site) is a relatively common calcium copper arsenate hydroxide mineral. It has a
stunning and memorable green color. Once you have seen Conichalcite you will remember it and won't confuse it
with any other mineral. It is often layered in acicular or botryoidal formation upon limonitic rocks that have a rusty
red to yellow color. Conichalcite on Limonite specimens produce a very colorful aesthetic display.

Conichalcite got its name from the Greek words
konis, meaning “powder,” and chalkos, meaning “copper,” in
reference to the copper in the composition and its occasional appearance as a powdery crust. Relatively
uncommon but widespread, conichalcite can be found in many minor occurrences, however good specimens
can be found in localities in Spain, England, the United States, Mexico, Chile, and Namibia.

Conichalcite occurs as a secondary mineral in oxidized copper deposits as a product of the alteration of
enargite. Conichalcite forms in the “
oxidation zone” of copper ore bodies. (That is where highly oxygenated
ground water interacts with copper sulfides and oxides resulting in the formation of beautiful and colorful
minerals. All this occurs in a layered area which has been named the “oxidation zone”.)

Conichalcite is just one of these minerals. Other minerals that are found in the Oxidation Zone include; Malachite,
Azurite, Linnarite, Beudantite, Adamite, Cuproadamite, Olivenite and Smithsonite.

Some of the most sought after specimens are;
- Botryoidal Conichalcite on Limonite with a coating of shiny Calcite Crystals
- Fine Acicular Conichalcite formations on Calcite
-Large Spherical Botryoidal formations in vivid green

Ref. http://en.wikipedia.org/wiki/Conichalcite
Superb Old Stock Calcite on Conichalcite

This is a rare Old Stock specimen of Calcite on Conichalcite from the famous
Mina Ojuela, Mapimi, Durango, Mexico. This Bright green botryoidal
Conichalcite with Gemmy clear calcite cubes on a rust red Limonite matrix is a
classic mineral from a classic location. The botryoidal Conichalcite is mostly
coated with Calcite except for one location which has a beautiful formation of
botryoidal Conichalcite that is visible in photos. The Calcite cubes are from
micro up to 5mm.  
Truly a rare find ex Junior McKinney collection from Spruce Pine, NC

This specimen weighs 4.5 oz or 0.28 lbs (130g)
and measures 3.4 x 2.1 x 1.75 inches (8.6 x 5.5 x 4.4 cm)
)

Superb Old Stock Calcite on
Conichalcite
Old Stock Calcite on Conichalcite

This is a rare Old Stock specimen of Calcite on Conichalcite from the famous Mina Ojuela, Mapimi,
Durango, Mexico. This Bright green botryoidal Conichalcite with Gemmy clear calcite cubes on a rust red
Limonite matrix is a classic mineral from a classic location.
This specimen is from an estate sale in Virginia

This specimen weighs 4.1 oz or 0.26 lbs (117g)
and measures 2
.3 x 1.9 x 1.7 inches (6 x 4.8 x 4.4 cm))
Item# CONIC10160022
Old Stock Calcite on
Conichalcite


$45.00