Tourmaline corundum gneiss

Virtual Museum ID: 19-NCM02

Specimen Summary

Tourmaline is a boron silicate mineral with a complex chemical formula, sometimes with aluminum, iron, magnesium, manganese, lithium, and many other elements. Tourmaline is very often black, and some common types of tourmaline are schorl (usually dark brown to black), dravite (yellow to black, depending on composition), and the elbaite varieties in many colours. A special type of tourmaline called "watermelon" tourmaline shows a gradation of colours from green to pink, like a cut watermelon. Well-formed crystals of tourmaline are also considered a semi-precious gemstone.

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:

Passmore, BC

Specific Site:

Blu starr property

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11 (NAD 83)

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Specimen Details

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Primary Features:

Tourmaline corundum gneiss

Primary Mineral Formula:

(Ca,K,Na, ▢)(Al,Fe,Li,Mg,Mn)3(Al,Cr, Fe,V)6 (BO3)3(Si,Al,B)6O18(OH,F)4 · Al2 O3

Primary Category:

silicate oxide

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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