| the Black Hills, South Dakota and an 18-m-long beryl crystal from a pegmatite at Malakialina, Madagascar...valuable colored gemstones, including varieties of beryl, tourmaline, topaz, spodumene, and garnet. More...from large isolated rare element minerals (e.g. beryl) which can be separated from each other by several...pegmatites from Sveconorwegian terranes in southwestern Sweden. Precambrian Research 76, 15-30. Simmons, W.B....mineral specimens for collectors (like cassiterite, beryl, topaz, gadolinite-(Y), etc.) has taken place in |
