 | | Journal (article/letter/editorial) | | 70(2), pp. 159±173 Emeralds from the Delbegetey deposit (Kazakhstan): mineralogical characteristics and...emeralds from the Delbegetey deposit (Kazakhstan). The characteristic features of Delbegetey emeralds are...situate the deposit within the range characteristic of other granite-related emerald deposits. Emerald crystallization...of the Delbegetey emeralds can be estimated at 570ÿ1240 bar. K EY WORDS : emeralds, Delbegetey, Kazakhstan...known sites where emeralds occur in Kazakhstan: Kuu Yuzhnoe and Delbegetey. These are situated in the central |  | | Journal (issue) | | orientated perpendicular to the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy...caxis. Weak chatoyancy of rhodochrosite from Kazakhstan is caused by its agate-like structure. Four-rayed...aquamarine and yellow heliodor, and very rarely emerald, have been seen by the author in Brazil. The studied...4). Some new unusual cat's-eyes and star stones Quartz-tourmaline cat's-eye from Brazil A strange stone...was covered by colourless rock crystal so this quartz-tourmaline stone is a sort of 'natural doublet' |
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