1.6" Thunder Bay Amethyst Cluster With Hematite

This is a cluster of amethyst crystals from the Blue Points Mine near Thunder Bay, Ontario. Much of the amethyst from Thunder Bay is unique in that it has a reddish coating of hematite (an iron based mineral) on the crystals.

In the 1950's amethyst deposits were discovered about 30 miles NE of Thunder Bay Ontario while building a road. Since the 1960's it has been mined in the area. The amethyst from Thunder Bay can range from light, delicate purples to almost black in color. One very distinctive characteristics of many Thunder Bay amethyst crystals is the the inclusion of red hematite (microscopic disks/spherules within the amethyst). These inclusions can cause crystals to have red highlights, zones or even appear completely red in color.

Amethyst is a purple variety of quartz (SiO2) and owes its violet color to natural irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It’s considered a semi-precious gemstone, and just two centuries ago was considered to have a value on par with diamonds, sapphires and rubies.
Quartz var. Amethyst with Hematite
Blue Points Mine, Thunder Bay, Ontario
1.6" wide