Results 251 to 260 of about 630,186 (263)
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Fibrous nanoinclusions in massive rose quartz: HRTEM and AEM investigations
American Mineralogist, 2002Pink fibrous crystals within massive rose quartz from localities in California, South Dakota, Brazil, Madagascar, and Namibia were examined with high-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM). This study reveals that the nanofibers in all samples are related to dumortierite.
Chi Ma +2 more
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Collecting Rose Quartz and other Minerals on Plumbago Mountain
Rocks & Minerals, 1973(1973). Collecting Rose Quartz and other Minerals on Plumbago Mountain. Rocks & Minerals: Vol. 48, No. 2, pp. 75-77.
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The orientation and symmetry of light spots and asterism in rose quartz spheres from Madagascar
The Journal of Gemmology, 2006The orientation of light spots on the surface of four asteriated rose quartz spheres from Madagascar is described. The up to 50 different light spots form similar patterns on all samples examined with respect to their orientation, but are somewhat different according to their relative intensity.
Karl Schmetzer, Michael Krzemnicki
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Dynamic biaxial absorption spectra of Ti3+ and Fe2+ in a natural rose quartz crystal
Mineralogical Magazine, 1985AbstractThe absorption spectrum of Ti3+ in quartz is typical for that element in an octahedral site, except for the high oscillator strength of the band which indicates intensive charge transfer, most likely between a substitutional Ti4+ and an interstitial Ti3+.
A. J. Cohen, L. N. Makar
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Physics and Chemistry of Minerals, 2017
An extensive characterization of trace elements and point defects in rose quartz from the Borborema Pegmatite Province (BPP) in the northeast of Brazil was carried out by complementary spectroscopic methods. The aim here was to document the change in the configuration of point defects into the quartz lattice induced by heat-treatment and ionizing ...
Pedro L. Guzzo +4 more
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An extensive characterization of trace elements and point defects in rose quartz from the Borborema Pegmatite Province (BPP) in the northeast of Brazil was carried out by complementary spectroscopic methods. The aim here was to document the change in the configuration of point defects into the quartz lattice induced by heat-treatment and ionizing ...
Pedro L. Guzzo +4 more
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The Canadian Journal of Mineralogy and Petrology
Abstract Bazzite, ideally Be3Sc2Si6O18, has been discovered for the first time at two granitic pegmatite localities in Canada: the Quadeville Rose Quartz quarry, Ontario (Bz-ON/CMNMC 90604), and the Bugaboo Castles aquamarine deposit, Purcell mountains, British Columbia (Bz-BC/CMNMC 90725). Bazzite from both Canadian localities occurs as
Paula C. Piilonen +5 more
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Abstract Bazzite, ideally Be3Sc2Si6O18, has been discovered for the first time at two granitic pegmatite localities in Canada: the Quadeville Rose Quartz quarry, Ontario (Bz-ON/CMNMC 90604), and the Bugaboo Castles aquamarine deposit, Purcell mountains, British Columbia (Bz-BC/CMNMC 90725). Bazzite from both Canadian localities occurs as
Paula C. Piilonen +5 more
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Characterization of synthetic overgrowth on a natural rose quartz aggregate
A large (~108.2 × 71.9 × 44.0 mm) pink-hued crystal aggregate was submitted to the GIT Gem Testing Laboratory for identification. Initial assessment showed classic quartz characteristics - large hexagonal prisms terminating in rhombohedral faces - and notable color zoning, with a sharp contrast between colorless overgrowth and pink core.Lhuaamporn, Thanapong +3 more
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Crystallized and massive rose quartz deposits in Brazil
The Journal of Gemmology, 1991Jacques P. Cassedanne, Maurice Roditi
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