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Scepter quartz

Since the growth conditions are uncontrolled in the growth of natural quartz crystals, it is probable that the growing crystals experience major conditional changes, such as cessation of growth and regrowth from new solution. Under such circumstances, crystals formed early on may act as seed crystals. [Pg.216]

Figure 7.11. Schematic illustrations of (a), (b) epitaxial lateral overgrowth, ELO, and (c) the mechanism of formation of scepter quartz. Figure 7.11. Schematic illustrations of (a), (b) epitaxial lateral overgrowth, ELO, and (c) the mechanism of formation of scepter quartz.
Figure 10.16 indicates why both scepter quartz and conunon quartz coexist in a druse.When quartz crystals are synthesized hydrothermally using a seed, a part of... [Pg.216]

Figure 10.15. (a) Ordinary scepter quartz with umbrella portion only at the top of the trunk portion, (b) Scepter quartz with many umbrella portions at the top and along the edges of the trunk. [Pg.217]

Y. Takahashi, H. Imai, M. Hosaka, and 1. Sunagawa, Genesis of scepter quartz. Collected Abstracts, 2000 Annual Meeting of Miner. Soc. Japan, 2000, p. 97 (in Japanese)... [Pg.224]

Figure 106 An amethyst scepter (Brandberg, South Africa) (a) and an example of parallel growth in smoky quartz (Galileia, Minas Gerais, Brazil) (b). Figure 106 An amethyst scepter (Brandberg, South Africa) (a) and an example of parallel growth in smoky quartz (Galileia, Minas Gerais, Brazil) (b).
See other pages where Scepter quartz is mentioned: [Pg.140]    [Pg.216]    [Pg.216]    [Pg.217]    [Pg.140]    [Pg.216]    [Pg.216]    [Pg.217]    [Pg.198]    [Pg.129]   
See also in sourсe #XX -- [ Pg.218 , Pg.228 , Pg.232 , Pg.234 , Pg.244 , Pg.260 , Pg.269 ]



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