Measurements: 70 x 40 x 27 mm
Description: A cluster of pale amethyst and green coloured botryoidal chalcedony ('grape agate'). The greenish colour is caused by a coating / inclusions of celadonite. The aggregates have a phantom-like appearrance.
The bottom and bits on the side of the specimen show a partially exposed whitish mineral. The specimen has relatively little damage.
Background: These specimens first appeared on the global mineral market in 2016. Although they are fairly abundant at the moment, it is not known how much of this treasure is still left in the ground.
Weight
of Specimen: 40.0 g
Chemical
Composition: SiO2 (quartz
var. chalcedony)
K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
(celadonite)
Hardness
on Mohs
Scale: (quartz
var. chalcedony) 7
(celadonite) 2
Location: Batu Manakarra mining district - Mamuju Area, Barat Province, Sulawesi Island, Indonesia.
Specimen
Code: OTH
034
R 250
.
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