Thank you Dr. Emily Cahoon and Allan Lindberg for sitting down to talk about this amazing gemstone.
Watch a full interview with Allan about his faceting history and lapidary innovations here:    • Master Faceter and Lapidary Innovator...  

Badur (2022) Master's Thesis relating to copper in sunstones: https://etd.auburn.edu/handle/10415/8200

Jewel Cutter's Andesine Scam Article: http://www.jewelcutter.com/articles/a...

Patreon:   / donohuelabs  
Etsy: https://donohuelabs.etsy.com/

Erratum: I said moonstone was a labradorite. There is a variety that is labradorite, but most moonstone (like the one I pictured) is actually oligoclase feldspar.