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Kamis, 02 Mei 2013

Crystal

The mottled outside is Chalcedony, the banded area is agate, and the crystalline interior is quartz. All of that is SiO2. This particular form is called a Geode.

Photo: The mottled outside is Chalcedony, the banded area is agate, and the crystalline interior is quartz. All of that is SiO2. This particular form is called a Geode.
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