Jadeite In Thin Section

Jadeite s color commonly ranges from white through pale apple green to deep jade green but can also be blue green like the recently rediscovered olmec blue jade pink lavender and a multitude of other rare colors.

Jadeite in thin section. Anomalous blue interference colors are common maximum interference colors are first order red or yellow. Green nephrite from all three main sources shares some features. Chloromelanite is a very dark green to black variety.

Garnet often pyrope or mg rich almandine and omphacite na ca al mg clinopyroxene. Probably in this case the omphacite has a higher concentration of jadeite because the outer rims of coronas are composed of a symplectite of omphacite oligoclase corundum and or spinel. Both must be present and neither component more than 75 vol.

In this thin section of green nephrite from the 10 deposit in siberia the black dots are chromite and the whitish strips are parallel tremolite crystals. In thin section grain mount. Eclogite never contains plagioclase.

Chemically jadeite lies intermediate between albite na alsi 3 o 2 and nepheline na alsi o 4. Jadeite is colorless to very pale green in thin section. Colorless in thin section.

Jadeite composition commonly approach the ideal formula naalsi 2 o 6. Courtesy jade factory and jade mountain. Omphacite has higher birerefringence and aegirine and aegirine augite have higher birerifringence and are more distinctly green.

Color is largely affected by the presence of trace elements such as chromium and iron. Alex strekeisen i vetrini della mia fantasia. There you ll find additional information on this and many.