Robuta

https://www.gemgazer.com/clinozoisite-faceted-california-usa--293-carats-693-p.asp Clinozoisite faceted California USA 2 93 carats Clinozoisite is a member of the Epidote group of minerals and is a complex calcium aluminium sorosilicate with formula Ca2Al3 Si2O7 SiO4 O OH california usaclinozoisitefacetedcarats