Dims: 3.3" x 2.2" x 2.1" (8.4 x 5.6 x 5.3 cm)
Wt: 6.42 oz. (182.0 g)
Sheffield Lake, Quebec, Canada
Though broken and heavily internally fractured, this specimen is quite attractive, and rather unusual. It consists of a large fragment of a Eudialyte crystal that is resting on a base made up of what appears to be a variety of feldspar, and a small amount of crystalline anhydrite. The Eudialyte has a deep red color with a hint of violet, a vitreous luster, and is transparent with small spots of clarity between the internal fractures. The material that I believe is anhydrite has the standard pale blue color, columnar habit, and basal parting that is evident in most specimens that I have seen. The feldspar material is hard (5-6), and has clean and definite cleavage in 2 directions. It is colorless and has a vitreous to pearly luster. I am relatively certain about my hypotheses, but I want to make certain, and will write more when I do. Nonetheless, it is a very attractive specimen of a mineral that I don't see often.