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Maw Sit Sit

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'Maw Sit Sit' is a polyminerallic material (a "rock") from Burma (Myanmar) which has achieved some prominence as both a gemstone and a carving material. While some have classed this as a "jadeite" (and it has been called 'Chrome Jade'), in reality the dominant mineral is another clinopyroxene, kosmochlor and it should not, therefore, be considered a variety of jadeite. It was first noted in the early 1960’s by the famed Swiss gemologist Eduard J. Gübelin during field investigations in Burma.

Composition of Maw Sit Sit:

Kosmochlor – the dominant mineral species in mawsitsit is kosmochlor, a sodium chromium pyroxene previously called “ureyite”. (Ureyite was discredited as a mineral species when it was determined to be identical to kosmochlor.) Kosmochlor constitutes about 60 percent of mawsitsit, and is the primary component of both the brilliant emerald green and dark green-black patches.

Chromian Jadeite – a chromium-enriched jadeite makes up approximately 15 percent of mawsitsit.

● Chromian Eckermannite – a chromium-enriched sodium, magnesium, iron amphibole group mineral, makes a small contribution of only about 4 percent of mawsitsit.

● Chromian Albite – a chromium-enriched albite usual constitutes 1 per cent of mawsitsit.

Visit gemdat.org for gemological information about Maw Sit Sit.

Classification of Maw Sit Sit

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Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Maw Sit Sit

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