Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Topaz from
Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA


06704370017374695309852.jpg
Topaz

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00429190017272014729871.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
01390630017373596065789.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05218140017402571098057.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00382170017374078175349.jpg
Topaz

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
03162590017403436449997.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05498100017373421841167.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
01686780017402557436298.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
04978220017374695313311.jpg
Topaz

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00816060017272014764025.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
01390630017373596065789.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05218140017402571098057.jpg
Topaz, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Topaz
Formula:Al2(SiO4)(F,OH)2
Comments:First found in the mid-1950s and so often unrecognized in earlier collections, topaz occurs rarely as equant, rhombic cross-section crystals up to 1 cm in the cavities or more commonly up to 5.6 cm embedded in quartz-albite-muscovite matrix. Greasy, orange-brown crystals are partially or wholly altered to muscovite and were earlier mistaken for "pinite" pseudomorphs after spodumene.
Habit:equant or flattened with multiple terminal forms
Colour:colorless to pale blue, orange (altered)
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz9
Muscovite4
Elbaite1
Lepidolite1
Microcline1
Data
Mineral Data:Click here to view Topaz data
Locality Data:Click here to view Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (9 photos)
Data Identifiers
Mindat Occurrence Record ID:36950
Long-form Identifier:1:3:36950:5
GUID (UUID V4):0
Nearest other occurrences of Topaz
4.4km (2.7 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
4.6km (2.9 miles) ⓘLong Hill prospects (Turkey Hill prospects), Haddam, Middlesex County, Connecticut, USA
9.4km (5.8 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
10.1km (6.3 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
13.0km (8.1 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
15.7km (9.8 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
34.6km (21.5 miles) ⓘWillimantic, Windham, Windham County, Connecticut, USA
62.7km (38.9 miles) ⓘPorter Hill Road roadcut, Long Hill, Trumbull, Fairfield County, Connecticut, USA
63.5km (39.5 miles) ⓘCorporate Drive road cut, Long Hill, Trumbull, Fairfield County, Connecticut, USA
63.5km (39.5 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
References
Schooner, Richard. (1958) THE MINERALOGY OF THE PORTLAND-EAST HAMPTON-MIDDLETOWN-HADDAM AREA IN CONNECTICUT (With a few notes on Glastonbury and Marlborough)
Scovil, Jeffrey A. (1992) Famous Mineral Localities: The Gillette Quarry, Haddam Neck, Connecticut. The Mineralogical Record, 23 (1) 19-80
 
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