Chalcedony ("Grape Agate") OTH 030

2-sided specimen of purple and blue-green botryoidal chalcedony aggregates

Measurements:  50 x 35 x 17 mm

Description:  A two-sided specimen of purple and blue-green botryoidal chalcedony aggregates. The greenish colouring is probably caused by a coating / inclusions of celadonite.

The specimen has a few nicks.

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:  18.9 g

Chemical Composition:  SiO (quartz var. chalcedony)
                                                      K(Mg,Fe2+)Fe3+(Si4O10)(OH)2  (celadonite)

Hardness on Mohs Scale:  (quartz var. chalcedony) 
                                          (celadonite)  2

Location:  Batu Manakarra mining district - Mamuju Area, Barat Province, Sulawesi Island, Indonesia.

Specimen Code:  OTH 030

R 180

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