The Potts Collection

A large display specimen with well formed dark green bladed crystals of actinolite in a white talc matrix.  Largest blades extend to almost 8cms....

A large well formed crystals with no matrix. 8.0cms x 6.7cms x 6.4cms. Pike's Peak, Colorado, USA. Potts' Collection #1054/P389.

A pale bluish cluster of crystals in parallel growth give a castellated appearance to this specimen.   There is minor muscovite mica. 3.8cms x 3.1cms...

A very unusual stumpy transparent green crystal.  The termination is undamaged but shows incomplete growth.   No matrix. 3.0cms x 3.0cms x 2.8cms....

A very rich development of rich blue azurite crystals and light green malachite over a limonite matrix. 11.5cms x 12.00cms x 4.6cms. Kamerezi Mine,...