![](http://www.alamy.com/thumbs/6/E8CF9400-930A-4097-8F21-B5C678D77EFE/HBYJY6.jpg)
Image taken from page 36 of 'The Determination of Rockforming Minerals ... Authorized translation from the first German edition by Erastus G. Smith ... Second edition' Image taken from page 36 of 'The Determination of Rockforming
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Photo credit: © Classic Collection / Alamy / Afripics
License: Licensed
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