Mexican Opal 13-19mm faceted beads (ETB00434) Chaorite

Mexican Opal 13-19mm faceted beads (ETB00434) ChaoriteMexican Opal Cantera opal These stones are comparable to Australian boulder opal and its origins are similar. These are found as small pockets or seams veins of opal associated with rhyolite matrix, the host rock, which is softer than the opal. The word cantera refers to the host matrix. Like boulder opal and koroit opal, these stones were not initially as prized as the pure cuts but cutters and buyers of both koroit boulder and cantera opal came to

Blue is caused by copper

This material is often called Pink Drusy

as it depends on what the type of other mineral it is included in

and Russia

B : 20 x 40 x 12 mm

these delicate crystal surfaces must originally have been protected by nature inside nodules or within cavities in the agate seam

Colorado USA

Peanut Fossil

C: 19 x 48 x 6 mm

This unique stone is found not far from Ulianovsk

A: 16 - 16

Dimensions of beads: (measurement is approx)9-10mm Length of this strand: 16