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PhotosPumpung Lukaas mine, Cempaka diamond fields, Riam Kanan, South Kalimantan Province, Kalimantan, Indonesia
4th Jul 2019 09:07 UTCUwe Kolitsch Manager
I thought it would be pieces of the limonite-rich, water-worn gravel hosting the diamonds (note: photo wasn't made by me).
Any opinions?
4th Jul 2019 10:06 UTCJolyon Ralph Founder
4th Jul 2019 11:53 UTCKeith Compton 🌟 Manager
One paragraph states: "The Kalimantan diamonds are commonly found together with a mineral suite that includes corundum, diaspore, zircon, chromite/spinel, pleonaste, rutile, and rare tektite (Ubaghs, 1941)"
The Ubaghs reference is: Ubaghs, J.C.H. 1941. Diamonds in Borneo. Report held in Perpustakan Direktorat Geologi, No F 41-2 (Translated from Dutch).
So perhaps they are tektites
Cheers
4th Jul 2019 14:43 UTCUwe Kolitsch Manager
5th Jul 2019 07:07 UTCUwe Kolitsch Manager
12th Jul 2019 00:25 UTCJason Utas
I looked around on Google for a similar tektite; this piece of Darwin glass is somewhat similar, although Darwin glass is generally much more vesicular than indochinites, excluding the Muong Nong layered tektites...
12th Jul 2019 11:21 UTCUwe Kolitsch Manager
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