Tourmaline, a naturally occurring semi-precious form of quartz, has sub-microsecond responsiveness and is useful in the measurement of very rapid transients. By selecting the crystal properly, the designer can ensure both good linearity and reduced temperature sensitivity. Although piezoelectric transducer...
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Quartz with Chlorite Phantoms - Tagging & locale Questions 4 k-m.minerals 10947 Mar 16, 2023 10:14Tony L. Potucek Help with locality 3 Michael Shaw 11659 Dec 30, 2022 17:45Jordi Fabre Unknown from Kabolela Mine, DRC in association with Brochantite and Heterogenite 4 cfrench58 10652...
A purple tourmaline grown out from the base of a skeletal quartz? 8 RheinSte 2443 Aug 28, 2024 14:59Roger Warin Question from a new user concerning a mineral from Kaiserstuhl/Germany 4 Tobi 1611 Aug 11, 2024 14:54jvanko Mineral question from a new user 1 Tobi 1028 Aug 11, 2024 ...
Is Quartz a pleochroic? Pleochroism:None. Cleavage/fracture: No cleavage, but fractures and healed fractures can be common. Relief and optic sign: Low; uniaxial (+). Is tourmaline a pleochroic? Tourmaline forms triangular prismatic crystals and can show a range of body colours. It alsoexhi...
Gneissic granite is grayish white and possesses medium to fine-grained structure (Fig. 4E); its mineral assemblage consists of dominant oligoclase, microcline (often as perthite intergrowths), and quartz, subordinate biotite and accessory apatite, zircon, tourmaline, and garnet. Gray and green ...
Tourmaline, a boron-bearing ring silicate, is ubiquitous at Tsa da Glisza (formerly Regal Ridge). It occurs as porphyroblasts in greenschist facies meta-volcanic and ultramafic rocks, as phenocrysts in granite, in quartz-tourmaline veins that cut the schists, and as granular black masses ...
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aSorry, the China below 18 years old are not allowed to fall in love. 抱歉,中国在18年以下没有允许坠入爱河。[translate] aturn right at the lights the you will see the park 向右转在光您将看见公园[translate] aQuartz–Feldspar–Garnet–Tourmaline– 石英长石石榴石电气石[translate] ...