Dendritic Agate 396922f96d9c151be8082bc5d7a56896 spindle-shaped fossils have surfaces marked

spindle-shaped fossils have surfaces marked by weak spiral lines in a helix

Zoisite is a mineral that is found in metamorphic and pegmatitic type rock

Other noteworthy types of beryl include emerald

many unique eggs have now been discovered in Mazon Creek fossils

The word Amethyst is derived from ancient Greek meaning "intoxication"

Dendritic Agate 396922f96d9c151be8082bc5d7a56896 spindle-shaped fossils have surfaces markedDendritic Agate can be translucent or opaque and typically white or gray. It is a variety of chalcedony quartz and is known for its tree like markings. The patterning is due to traces or iron or manganese that seep into the stone from neighboring sources during the growth period.