Colorless+rock-crystal
41Optical mineralogy — A petrographic microscope, which is an optical microscope fitted with cross polarizing lenses, a conoscopic lens, and compensators (plates of anisotropic materials; gypsum plates and quartz wedges are common), for crystallographic analysis.… …
42Paulingite — Infobox mineral name = Paulingite category = Zeolite Group boxwidth = boxbgcolor = imagesize = caption = formula = (K,Na,Ca)3 4(Si,Al)21O42 ·17 22H2O molweight = color = Colorless, light yellow, orange, red habit = typically as euhedral crystals… …
43Halite — For the market widely known as Halite , see Central Sofia Market Hall. Halite Halite from the Wieliczka salt mine, Małopolskie, Poland (size: 16x15x13cm) General Ca …
44Radon — This article is about the chemical element. For other uses, see Radon (disambiguation). astatine ← radon → francium Xe ↑ Rn ↓ Uuo …
45Anhydrite — Not to be confused with anhydride. Anhydrite Anhydrite, Chihuahua, Mexico General …
46Quartz-porphyry — Quartz porphyry, in petrology, is the name given to a group of hemi crystalline acid rocks containing porphyritic crystals of quartz in a fine grained matrix, usually of micro crystalline or felsitic structure. In specimens, the quartz appears as …
47Whitlockite — Infobox mineral name = Whitlockite category = Phosphate Mineral boxwidth = boxbgcolor = imagesize = caption = formula = molweight = 1,071.45 gm color = Colorless, gray white habit = massive to tabular system = Trigonal twinning = cleavage = None… …
48Garnet — For other uses, see Garnet (disambiguation). Garnet General Category Nesosilicate Chemical …
49List of Pokémon Trading Card Game sets — This is a list of expansion sets for the Pokémon Trading Card Game. Contents 1 Wizards of the Coast 1.1 The First Generation Sets 1.1.1 Base Set 1.1.2 Jungle …
50Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
