File:Prism spectroscope scale.jpg
From The Gemology Project
Prism_spectroscope_scale.jpg (294 × 52 pixels, file size: 4 KB, MIME type: image/jpeg)
adapted from geminterest.com
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|current||07:49, 6 September 2006||294 × 52 (4 KB)||Doos||adapted from geminterest.com|
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