Talk:Spectrolite

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poor explanations that sound like a commercial for finnish material & article should be merged in "labradorite" article

This article should be merged with the labradorite wikipedia article, since spectrolite is ONLY a tradename for material that shows an almost COMPLETE RANGE OF COLOURS, not only finnish material. What if we had an article for grey marble, red marble, black marble etc? Or hawk-eye and bull-eye in their own seperate articles from tiger-eye (hawk and bull are only blue and brick red varietes of tigereye)? It's simply ridiculous and purely commercial. another detail: the book "gemstones of the world" by Schumann says that spectrolite is a "labradorite from Finland that shows the spectral colors especially effectively" (page 182 : http://books.google.fr/books?hl=fr&id=V9PqVxpxeiEC&q=spectrolite#v=snippet&q=spectrolite&f=false ). This is not very precise, and a better explanation can be found in the book (containing much more chemistry and crystallography elements) "Gems" sixth edition by O'Donoghue, 2006. He says (p267)that "Most common colours of labradorescence are blue and green. When many spectral colours are seen simultaneously the term spectrolite has been coined.'" He even adds that spectrolite is the term used instead of labradorite when material showing a "rich" range of colours is mined, regardless of the country of origin (page 265-266) . On page 266 it is said that "Some labradorite of spectrolite quality has also been found in Madagascar." Hence, spectrolite is not finnish material anymore. ( http://books.google.fr/books?id=ZwcM5H-wHNoC&pg=PR9&dq=gems+o%27donoghue+sixth+edition+2006&hl=fr&sa=X&ei=NrUkT-m5KtPY8gPpt-m-Bw&ved=0CDUQ6AEwAA#v=onepage&q=spectrolite&f=false )