Colorless calcite with large crystals Hedenbergite but it is an excellent

but it is an excellent piece for studying the details—best for someone with good eyesight

'Agate' refers to chalcedony with banded color

one is shaped like two points of a star with symmetry that doesn't seem accidental (second to last image)

with phosphorescence apparent

Epidote has a good luster which is apparent with the more well-formed crystals on the specimen

Colorless calcite with large crystals Hedenbergite but it is an excellentLocale: Santa Eulalia, Chihuahua, Mexico Approx dimensions: 3. 5 x 2. 5 x 1" Approx weight: 89g This calcite specimen from Santa Eulalia has large colorless calcite crystals and druzy on a dark iron oxide matrix. The calcite formed a chunky druzy of icy colorless intersecting rhombohedral crystals that almost appear cubic in areas. There are three larger modified rhombohedral crystals perched atop. This is a beautiful example of growth forms typical