Chalcedony ("Grape Agate") OTH 020

Multi-sided botryoidal green and amethyst coloured chalcedony, "grape agate"

Measurements:  75 x 53 x 28 mm

Description:  A stunning, multi-sided specimen consisting of purple to greenish-blue botryoidal aggregates of chalcedony. The greenish colouring is probably caused by a coating / inclusions of celadonite.

The specimen displays well on a flat surface, in various positions. It has little damage - only 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:  82.5 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 018

R 600

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