Apophyllite:
Presentation :
Etymology: from the Greek apo, far from, and phyllos, leaf, with reference to its exfoliation when heated.
Chemical formula : KCa 4 Si 8 O 20 (F,OH)...
Virtues of pink tourmaline or rubellite
It is undoubtedly its electrical properties which explain its use in geobiology. Tourmaline is known to protect habitats against bad waves,...
Arizona Wulfenite:
https://www.facebook.com/152897438691454/videos/167029740611557/
Discovered in 1845, it honors the name of the Austrian mineralogist Franz Xavie...
Presentation :
Names) :
Anhydrite* angelite variety.
Etymology:
From the Greek anhudros = without water, unlike gypsum which contains water (Werner, 1803).
Color :
L...
Presentation :
Often confused with jade despite its much lower hardness 2.5 to 4 for Serpentine compared to 6.5 to 7 for Jade and Jadeite.
Names) :
Serpentine => An...
