Here is a great large cabinet size specimen of Blue Corundum in Matrix. This specimen comes from Gallatin County, Montana. Specimens like these are very hard to come by. These blue crystals of corundum are within a granite and mica type matix. There are a few dozen crystals within this specimen. The largest crystal measures approx. 2.1 cm long x 1.24 cm thick and is well terminated. … More info

Corundum var. Sapphire  Zazafotsy Quarry, Ihosy District, Ihorombe, Madagascar 7.5 cm x 5.8 cm x 3.5 cm, 330 grams / 1650 carats   Here is a nice, rather large, tabular hexagonal sapphire crystal from this well-known quarry.  A great specimen, not cuttable, but could be a good candidate for a carving. It has some rich sapphire blue color which does allow… More info

Bi-color Sapphire / Ruby in Matrix, Mkuyuni, Uluguru Mountains, Tanzania 6.08 cm x 4.32 cm x 2.12 cm, 67.6 grams Here is a very interesting specimen of Bi-colored Corundum in matrix from Tanzania. It looks similar to a Winza Sapphire / Ruby.  The matrix does not appear to be correct for Winza, however the listed locale in in the same region, and so few crystals ever come out stil… More info

Rare Montana Missouri River Sapphire in Matrix Helena, Montana,  6.64 cm x 5.28 cm x 4.1 cm, 152.3 gr.   Now here is a Montana Sapphire specimen you do not see everyday. This came out of an old Montana Collection! Very few examples are known to exist and even fewer are intact. This is a Montana Sapphire still in it's lamproite matrix.  This specimen … More info