Jadeite - ALEX STREKEISEN
Jadeite composition commonly approach the ideal formula (NaAlSi 2 O 6); it is the structural anolag of diopside CaMg(SiO 3), and an incomplete series probably exists where Na + and Al 3+ replace Ca 2+ and Mg 2+.
14.1.3: Silicate Class - Chain Silicates - Geosciences LibreTexts
Aug 28, 2022 · Properties in Thin Section Jadeite is colorless to very pale green in thin section. Birefringence is low; anomalous blue interference colors are common, maximum interference colors are first-order red or yellow. Jadeite exhibits typical clinopyroxene shape and cleavage but has a higher 2V than most.
Jadeite - Clark Science Center
In Thin Section/Grain Mount: Jadeite has lower indices of refraction than other pyroxenes. Omphacite has higher birerefringence and aegirine and aegirine-augite have higher birerifringence and are more distinctly green.
Photomicrographs of thin sections of (a) jadeitite s.str. (albite ...
The jadeite quartzite occurs as layers and boudins within the coesite-bearing whiteschist, and shows similar whole-rock REE distribution patterns to both granitic gneiss and whiteschist.
Thin section showing jadeite crystals with serrated high-angle …
Thin section showing jadeite crystals with serrated high-angle sutured boundaries. Section 2 mm across, cross-polarized light with colours enhanced with inserted gypsum plate.
Thin section of jadeitite with a recovery texture resembling foam …
Thin section of jadeitite with a recovery texture resembling foam and showing a number of grains in the aggregate with triple junctions close to 120°. Section 1.25 mm across, cross-polarized...
Jadeite Mineral Data
Jadeite Stronalsite. Comments: White stronalsite veinlets in massive pale green jadeite. Location: Ohasa, Okayama, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Color: Apple-green, emerald-green, bluish green, leek-green, greenish white, white, may show green spots, rarely blue or violet; colorless in thin section. Streak: White. Luster: Subvitreous, pearly on cleavages. Optical Class: Biaxial (+). Orientation: Y = b; Z c = 32±{55±.
dentification of jadeite. However, it is important to make a polished thin section or a polished section to identify the opaque minerals that occu.
Japanese Jadeite: History, Characteristics, and Comparison with …
The thin section of lavender jadeite from Itoigawa-Omi was almost colorless under plane-polarized light (see figure 7-B1). The sample was semi-transparent to translucent and mainly composed of fine to micro-grained crystals around 0.1–0.3 mm in …
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