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GEOREF RECORD

A Scottish "diamond" specimen rediscovered and re-identified; the first Scottish occurrence of piemontite

John W. Faithfull
A Scottish "diamond" specimen rediscovered and re-identified; the first Scottish occurrence of piemontite
Scottish Journal of Geology (2007) 43, Part 1: 33-40

Abstract

A possible occurrence of diamond near Ben Hope in Sutherland was described in 1901. For most of the 20th century, the specimen had been assumed lost, and thus the identification could not be verified. This specimen has recently come to light. Re-examination shows that the specimen contains no diamonds, but rather contains a very unusual assemblage of piemontite - spessartine - hematite - braunite - muscovite - K-feldspar - quartz. This is the first Scottish occurrence of true piemontite. Revisiting the original locality, no in-situ exposures were found, but this lithology forms a distinctive component of glacially transported boulders over an area to the east and south of Ben Hope. It is almost certainly derived from the local Moine, and represents a unit with an oxidized, coarse clastic protolith. If found in situ, this unit may be a useful marker bed in the otherwise homogenous psammitic rocks of the Moine in this area.


ISSN: 0036-9276
EISSN: 2041-4951
Coden: SJGEAX
Serial Title: Scottish Journal of Geology
Serial Volume: 43, Part 1
Title: A Scottish "diamond" specimen rediscovered and re-identified; the first Scottish occurrence of piemontite
Author(s): Faithfull, John W.
Affiliation: University of Glasgow, Hunterian Museum, Glasgow, United Kingdom
Pages: 33-40
Published: 2007
Text Language: English
Publisher: Scottish Academic Press, Edinburgh, United Kingdom
References: 22
Accession Number: 2008-071036
Categories: Igneous and metamorphic petrologyGeochemistry of rocks, soils, and sediments
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 plate, 2 tables, geol. sketch map
N58°15'00" - N58°34'60", W05°00'00" - W04°15'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200819
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