uneven fracture

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• Fracture (mineralogy) — This article is about the terminology used to describe fracture surfaces. For fractures in rocks and minerals per se, see Fracture (geology) In the field of mineralogy, fracture is a term used to describe the shape and texture of the surface… …   Wikipedia

• fracture — fracturable, adj. fractural, adj. fracturer, n. /frak cheuhr/, n., v., fractured, fracturing. n. 1. the breaking of a bone, cartilage, or the like, or the resulting condition. Cf. comminuted fracture, complete fracture, compound fracture,… …   Universalium

• Sulfide minerals — ▪ Table Sulfide minerals name colour lustre Mohs hardness specific gravity habit or form fracture or cleavage refractive indices or polished section data crystal system argentite blackish lead gray metallic 2–2 1/2 7.2–7.4 cubic or octahedral… …   Universalium

• Oxide minerals — ▪ Table Oxide minerals name colour lustre Mohs hardness specific gravity anatase brown to indigo blue and black; also variable adamantine to metallic adamantine 5½–6 3.8–4.0 boehmite white, when pure 3 3.0–3.1 brookite various browns metallic… …   Universalium

• Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… …   Universalium

• Sulfosalts — ▪ Table Sulfosalts name colour lustre Mohs hardness specific gravity argyrodite bluish to purplish black; steel gray when fresh metallic 2½ 6.1–6.3 bournonite steel gray to iron black metallic 2½–3 5.8–5.9 enargite gray black to iron black… …   Universalium

• Phosphate minerals — ▪ Table Phosphate minerals name colour lustre Mohs hardness specific gravity amblygonite white to creamy white; slightly tinted vitreous to greasy 5½–6 3.0–3.1 apatite carbonate apatite variable, greens predominating vitreous 5 2.9–3.2… …   Universalium

• Clearcreekite — General Category Carbonate mineral Chemical formula Hg1+3CO3(OH)∙2H2O Strunz classification 05.DC.30 …   Wikipedia

• Vanadate minerals — ▪ Table Vanadate minerals name colour lustre Mohs hardness specific gravity carnotite bright yellow to lemon or greenish yellow dull or earthy soft 4–5 descloizite brownish red to blackish brown; various shades from orange red to black and green… …   Universalium

• Native elements — ▪ Table Native elements name colour lustre Mohs hardness specific gravity habit or form allemontite tin white; reddish gray metallic 3–4 5.8–6.2 kidneylike masses amalgam gold amalgam yellowish metallic 15.5 lumps or grains moschellandsbergite… …   Universalium

• Zoisite — This article is about the mineral named zoisite. For the Sailor Moon character, see Shitennou. Infobox mineral name = Zoisite category = Silicate mineral boxwidth = boxbgcolor = caption = Anyolite (left) tanzanite formula =… …   Wikipedia