Specimen #2487

Name: Chalcedony

Type: Mineral

Locality: Slanec Quarry, Slanské Mts, Košice Region, Slovakia

Favorite? N

Fluorescent? N

Size: 5.3 x 4.6 x 1.6 cm

Weight: 30

Acquired: 2013-01-31

Source: Arkenstone Auction

Label: N

Comment: According to mindat.org, Chalcedony is "traditionally defined as a fibrous cryptocrystalline variety of Quartz, more recently, it has been shown that much Chalcedony is a mixture of Quartz and Mogánite, another silica mineral. This piece is one of the better quality Chalcedony specimens I have seen from the Slanec Quarry in Slovakia. The individual "spheres", which measure up to 1.2 cm across, are actually somewhat lustrous, and have more of a milky or porcelain appearance compared to many other Chalceondy specimens that I have seen from this locality, despite some crazing. This is more than a reference piece, and would make a great addition to a Quartz collection, or a collection of European minerals.

Minerals: Chalcedony Quartz (SiO₂)

There are 2 pictures on file

M02487-01.jpg:

Chalcedony, Slanec Quarry, Slanské Mts, Košice Region, Slovakia - 5.3 x 4.6 x 1.6 cm

M02487-02.jpg:

Chalcedony, Slanec Quarry, Slanské Mts, Košice Region, Slovakia