Kimberlite and Cr-diopside hornblende pyrope garnet

Virtual Museum ID: 19-NCM18

Specimen Summary

Kimberlite is a dark coloured intrusive igneous rock that contains diamonds in its rock matrix. It has a porphyritic texture with large crystals in a fine-grained matrix. The most common mineral is olivine. Other minerals are phlogopite mica, ilmenite, serpentine, calcite, and magnetite. It does not contain any quartz or feldspar. Kimberlite sometimes contains diamonds.

Diopside is a rock forming pyroxene mineral. It is found in igneous and metamorphic rocks. It has two directions of cleavage at a near 90-degree angle. It has a monoclinic crystal system. Diopside is a good diamond indicator mineral. Because it can be easily cut and polished, it is used for commercial jewelry.

Specimen Data


The information listed below relates to the current holding location or collection that the sample is from, and whether the item is viewable at that location or is part of a private collection. Coordinates are given as guides, and we remind you that collecting specimens from these locations is not allowed. Caution is advised visiting such sites and Below BC assumes no responsibility for any injuries or trespassing charges that may occur as a result of the viewer entering these sites.

Collection Details

Original Collection:

Chamber of Mines of Eastern BC (NCM)

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Location Information

Sample Origin:

Castlegar, B.C.

Specific Site:

Rockstarrs Claim

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UTM Northing:



11 (NAD 83)

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Specimen Details

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Primary Features:

Kimberlite and Cr-diopside hornblende pyrope garnet

Primary Mineral Formula:

Mg2SiO4 · CaMgSi₂O₆ · (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 (OH)2

Primary Category:

carbonate silicate

Secondary Features:

Advanced Geological Information


The following section provides geological data relating to the specimen or the site it was collected from, when available. Information has been obtained from various sources including private and government datasets but may not be up to date. Any geological time periods or ages listed often relate to the primary geology of the area, and may not be the actual date of an event such as mineral formation.

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Additional Images