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Cassiterite from
Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Locality type:Quarry
Classification
Species:Cassiterite
Formula:SnO2
Comments:Tiny, dark, lustrous, sharp crystals typically embedded in lepidolite or spodumene with K-rich albite. Can easily be confused with tantalite-(Mn) or wodginite, though these minerals are differentiated from it by their strong iridescence.
Habit:twinned bipyramids
Colour:deep red-black to dark brown
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
References
References:Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
Associated Minerals Based on Photo Data:
Elbaite2 photos of Cassiterite associated with Elbaite at this locality.
Wodginite1 photo of Cassiterite associated with Wodginite at this locality.
Data
Mineral Data:Click here to view Cassiterite data
Locality Data:Click here to view Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Cassiterite
3.0km (1.9 miles) Walden Gem Quarry, Portland, Middlesex Co., Connecticut, USA
5.6km (3.5 miles) Hollister prospects (Hollister Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
9.0km (5.6 miles) Brack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
10.2km (6.4 miles) Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine; Old Lithia Mine; Chatham Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
13.0km (8.1 miles) Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
60.1km (37.4 miles) Lane's Mine (Lane's Lead and Silver Mine; Elm Street), Monroe, Fairfield County, Connecticut, USA
71.5km (44.4 miles) Blandford mica mines, Blandford, Hampden Co., Massachusetts, USA
95.4km (59.3 miles) Clark Ledge pegmatite locality, Chesterfield, Hampshire Co., Massachusetts, USA
99.5km (61.9 miles) Barrus farm pegmatite localities (Weeks farm), Goshen, Hampshire Co., Massachusetts, USA
 
Mineral and/or Locality  
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