Main index --- Minerals list --- Silicates index
White quartz
Name:White quartz
Description: Whitre opaque pebbles
You can sometimes find these gleaming white quartz pebbles on beaches. The stone on the right has been polished, and the one on the left is natural. When it is wet, it gleams nearly as much as if it was polished.
Blue Lace Agate
Name:Blue Lace Agate
Description: Pale blue chalcedony with delicate white patterns on it.
The blue colour in this agate is caused by copper salts. The patterned chalcedonies are often called agate.

Leopard skin agate Leopard skin agate

Name:Leopard Skin Agate
Description: Pale chalcedony with black edged red spots on it.

Turritella agate Turritella agate

Name:Turritella Agate
Description: Another agate with bits in.
This agate has fossils of Turritella (a type of snail) in it.

Larger pictures of Agate:

Blue Lace Agate - polished (tumbled).

Lace Agate

Leopard Agate. This specimen is natural.

Leopard Agate

This specimen is polished (tumbled) which brings out the pattern.

Leopard Agate

These are two specimens of polished (tumbled) Turritella Agate, from different sides.

Turritella Agate Turritella Agate

Turritella Agate Turritella Agate