celestine

Celestine Mineral Group: SULFATES
RocksForKids.com

Celestine is a heavy mineral that produces many beautiful crystals appreciated by mineral collectors. Celestine is used to produce color in fireworks.
SPECIMEN ORIGIN: Dundas, Ontario, CANADA	Blades of translucent, clear to milky, blue celestine.
SPECIMEN ORIGIN: Dundas, Ontario, CANADA	This is a heavy, pale blue massive specimen of celestine with a visible cleavage plane. Although celestine is often transparent & blue, it does also evolve into white vitreous masses that are a pale purple along the contact zone with the host rocks.
SPECIMEN ORIGIN: Hamilton, Ontario, CANADA		This orange celestine specimen shows with some cleavage planes. The celestine is in a vug in agray matrix rock.
SPECIMEN LOCATION: Royal Ontario Museum, Ontario, CANADA	Celestine has been called celestite in the past. Celestine is actually colorless but has a range of colors due to impurities. It is often named by its color, such as orange celestine or blue celestine.