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The Museum will be open on Wednesday, January 28, during regular hours, from 10 am to 5:45 pm. Due to the weather, some programs have been cancelled. Please check here for a full list, and check back for regular updates.

Regular updates will also be posted to our Facebook page and Twitter account (@AMNH).

Diabase

Diabase

Diabase

  • Exhibition Text

    • This rock solidified from a basaltic magma within a few hundred meters of the surface, probably beneath a volcano.  It cooled rapidly, giving it a fine-grained, peppery appearance.  The black mineral is pyroxene, and the white one is plagioclase.

      Donated by TILICON, Haverstraw, New York

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American Museum of Natural History

Central Park West at 79th Street
New York, NY 10024-5192
Phone: 212-769-5100

Open daily from 10 am - 5:45 pm
except on Thanksgiving and Christmas
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