fine-fibrous 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

• industrial glass — Introduction       solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …   Universalium

• iron processing — Introduction       use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting.       Iron (Fe) is a… …   Universalium

• chalcedony — chalcedonic /kal si don ik/, chalcedonous, adj. /kal sed n ee, kal seuh doh nee/, n., pl. chalcedonies. a microcrystalline, translucent variety of quartz, often milky or grayish. [1275 1325; ME calcedonie < LL chalcedonius (Vulgate, Rev. XIX, 19) …   Universalium

• Minyulite — (white) and sincosite (green), from Ross Hannibal Mine, Lead District, South Dakota, USA (size: 7.1 x 5.4 x 2.7 cm) General Category …   Wikipedia

• Meerschaum — ( i/ˈmɪərʃ …   Wikipedia

• endocrine system, human — ▪ anatomy Introduction  group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …   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

• joint — /joynt/, n. 1. the place at which two things, or separate parts of one thing, are joined or united, either rigidly or in such a way as to permit motion; juncture. 2. a connection between pieces of wood, metal, or the like, often reinforced with… …   Universalium

• Properties of selected silica minerals — ▪ Table Properties of selected silica minerals name colour lustre Mohs hardness specific gravity coesite colourless vitreous near 8 2.9–3.0 cristobalite (low temperature form) white or milky vitreous 6½ 2.2–2.3 lussatite (fibrous low… …   Universalium

• materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …   Universalium