Thunder Bay Amethyst Panorama (Amethyst Mine)
48.6912° N, 88.7262° W · ± 1 km
Amethyst from Ontario, Canada, with photos of specimens from this locality.
Minerals found here
Amethyst at Thunder Bay Amethyst Panorama (Amethyst Mine)
Large well-formed amethyst points and clusters from vugs in a fault zone cutting pink monzonite
- Formula
- SiO₂
- Morphology
- Crystals and clusters in vugs, well formed
- Typical size
- Crystals from tiny to about 23 cm; clusters to about 60 cm and up to 750 lb; points to 15 cm in diameter
- Associated minerals
- White quartz (vein and breccia cement)
- Surface features
- Free of deleterious coatings
- History
- First crystals found in 1935 by fishermen and collectors; mine officially opened in 1967
Sources: SRC-106
Geology of the locality
- Setting
- Amethyst in quartz veins and fault breccia within an Archean monzonite; large vugs formed where fracture sets intersect
- Type
- Hydrothermal
- Host rock
- Quartz monzonite to pegmatite
- Region
- Ontario
- Country
- Canada
Coordinates converted from the degrees-minutes-seconds position in the Ontario Mineral Inventory record (McTavish Township). The record lists it as a producing mine; current status not checked.
Sources: SRC-106
Sources
- SRC-106 · Database
Ontario Mineral Inventory record MDI52A10NE00007 (Thunder Bay Amethyst Panorama)Ontario Geological Survey
Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.