Green Tourmaline - Verdelite (Limited)

Ca,K,Na, )(Al,Fe,Li,Mg,Mn)3(Al,Cr,Fe,V)6

(BO3)3(Si,Al,B)6O18(OH,F)4[1][2]

Repeating Formula Of Tourmaline

https://www.gemjewellerykxo.ca/post/the-elements

More About Tourmaline

https://geology.com/minerals/tourmaline.shtml

Indicolite/Verdelite 18" Necklace

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High Quality Rare Crystal Frequency Bracelets

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