Measurements: 30 x 26 x 25 mm
Description: A multi-sided cluster of pale amethyst coloured aggregates of botryoidal chalcedony crystals (also known as 'grape agate'), with some aggregates having a greenish colouring, possibly caused by inclusions of celadonite.
Some of the aggregates have contact marks and nicks. The specimen displays well on a flat surface, in various positions, all-round.
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: 10.2 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: BARG 046
US $ 16
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