| Locality type: | Quarry |
| Classification |
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| Species: | Diopside |
| Formula: | CaMgSi2O6 |
| Comments: | pseudomorphed by tremolite (originally called Canaanite) |
| Habit: | flattened short to elongated prisms |
| Colour: | white to very pale green |
| Luminescent properties: | light blue-gray under SW |
| Quality for species: | Good crystals or rich for species - important (!) |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Tremolite | ⓘ6 photos of Diopside associated with Tremolite at this locality. |
| Calcite | ⓘ6 photos of Diopside associated with Calcite at this locality. |
| Data |
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| Mineral Data: | Click here to view Diopside data |
| Locality Data: | Click here to view Advance Stone Quarry, Boardman's Bridge, New Milford, Litchfield County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 973750 |
| Long-form Identifier: | 1:3:973750:1 |
| GUID (UUID V4): | c9a9f4fb-9e25-4ed1-b6d4-f0c0b8e9b30f |
| Nearest other occurrences of Diopside |
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| 17.1km (10.6 miles) | ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA |
| 19.3km (12.0 miles) | ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA |
| 20.9km (13.0 miles) | ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA |
| 24.1km (14.9 miles) | ⓘInterstate 84 road cuts (Route 6A bypass), Newtown, Fairfield County, Connecticut, USA |
| 24.8km (15.4 miles) | ⓘOld Quarry Nature Center, Danbury, Fairfield County, Connecticut, USA |
| 25.0km (15.5 miles) | ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA |
| 26.3km (16.4 miles) | ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA |
| 27.4km (17.0 miles) | ⓘMine Mountain graphite prospect, Cornwall, Litchfield County, Connecticut, USA |
| 27.7km (17.2 miles) | ⓘMine Mountain, Cornwall, Litchfield County, Connecticut, USA |
| 28.9km (17.9 miles) | ⓘCornwall, Litchfield County, Connecticut, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | AREA PUTNAM COUNTY, NEW YORK F ew minerals are commonly or uniquely associated with New York. The Herkimer...spinel from Amity, uvite from Pierrepont, and diopside from near Richville (the famous Dekalb locality)...chondrodite, occurred in world-class specimens from a New York locality that is now only of historical significance...specimens from the Tilly Foster iron mine, Putnam County, New York, can be seen in many American and foreign...the Connoisseur’s Choice specimen for this, the New York State issue. Chondrodite is a typically unspectacular |
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