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Dark Blue Aquamarine from the True Blue Showing, Yukon Territory

Groat, Lee A. and Turner, David and Rossman, George R. (2008) Dark Blue Aquamarine from the True Blue Showing, Yukon Territory. Canadian Gemmologist, 29 (2). pp. 48-53. ISSN 0226-7446.

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Dark blue aquamarine was discovered in the Yukon Territory in 2003. The crystals occur in a swarm of quartz ± siderite ± fluorite ± allanite veins that fill tension gashes in a syenite stock. Previous studies suggest a metamorphic origin for the mineralizing fluid and local derivation of vein constituents. The dark blue beryl contains nearly 6.0 wt.% iron oxide and the colour is thought to be due to intervalence charge-transfer between Fe^(2+) and Fe^(3+) cations. Five stones weighing up to 0.82 carat were faceted in 2003, but these are heavily fractured and included. However, many of the smaller crystals discovered to date are transparent.

Item Type:Article
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2008 Canadian Gemmological Association.
Issue or Number:2
Record Number:CaltechAUTHORS:20130501-133423224
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38211
Deposited By: Tony Diaz
Deposited On:06 May 2013 19:04
Last Modified:03 Oct 2019 04:55

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