| Prospect Park Quarry, North Haledon, N.J. |
| Formation- the quarry cuts into the Preakness Basalt |
| The site is an active quarry which cuts through several basalt flows. To date we have been allowed to collect only on the uppermost two levels of the pit. On the uppermost zone the basalt exists primarily as pillow lavas with well mineralized voids and vugs. There is also a zone of very vesicular light greenish gray basalt in one section. The second level cuts through a more solid lava flow where mineralization occurs in prehnite lined voids in the lava, much fewer in number and with little "rind" between the minerals and the matrix. |
| Minerals Found To Date Quartz- Rock Crystal, Amethyst, Milky, Chalcedony Calcite Albite Prehnite Babingtonite Stilbite Gmelinite Analcime Heulandite Laumontite Natrolite Datolite Apophyllite Pumpellyite Pectolite Stevensite Malachite Azurite Chalcocite Chrysocolla Chalcopyrite Pyrite Hematite |
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| Analcime |
| Albite |
| Apophyllite |
| Datolite |
| Babingtonite on Milky Quartz |
| Heulandite and Datolite on Laumontite |
| Stilbite on Quartz |
| Red Heulandite |
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| Datolite xls |
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| Blue Prehnite |
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| Azurite and Malachite |
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| Heulandite with Laumontite |
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| Stilbite |