Coloradoite (original) (raw)

Colour:

Iron black tending toward gray

Name:

Named in 1877 by Frederick Genth for the type localities which are in Colorado.

Co-Type Localities:

ⓘ Smuggler Mine, Balarat Mining District, Boulder County, Colorado, USA
ⓘ Keystone Mine, Magnolia Mining District, Boulder County, Colorado, USA
ⓘ Mountain Lion Mine - Keystone vein, Magnolia Mining District, Boulder County, Colorado, USA

Also, coloradoite (of Niggli), a variety of quartz latite that corresponds to the opdalitic magma-type of Niggli (1923)

Long-form identifier:

mindat:1:1:1110:1

94c352eb-0bb6-4a63-a8bf-2f92fad2c5f0

Approved, 'Grandfathered' (first described prior to 1959)

2.CB.05a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.

2.8.2.5

2 : SULFIDES
8 : AmXp, with m:p = 1:1

3.5.8

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
5 : Sulphides etc. of Hg and Tl

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Colour:

Iron black tending toward gray

Comment:

May tarnish to dull purple

Hardness:

VHN100=25 - 28 kg/mm2 - Vickers

Fracture:

Irregular/Uneven, Sub-Conchoidal

Density:

8.10 g/cm3 (Measured) 8.092 g/cm3 (Calculated)

Anisotropism:

Moderate, dark brownish red to blue-gray

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 38.6%.

Colour in reflected light:

White with a slight grayish brown tint, tarnishing to dull purple

Class (H-M):

43_m_ - Hextetrahedral

Cell Parameters:

a = 6.453 Å

Unit Cell V:

268.71 ų (Calculated from Unit Cell)

Morphology:

Massive, granular

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CIF Raw Data - click here to close

Geological Setting:

Hydrothermal, tellurium bearing precious metal veins.

Other Members of this group:

Associated Minerals Based on Photo Data:

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.