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Archive for July 23rd, 2014

posted by davek on Jul 23

We continue our Midsummer Night’s Gleam series with these glow in the dark rocks. One of the nice things about a night event at the Foster Botanical Gardens is the darkness allows for different experiences. Here is a collection of glowing rocks on display. These are calcite and some other similar minerals that look glow under the dark light. This is caused by a physical property knows as “fluorescence” where these rocks absorb a small amount of light and later release them in a different wavelength. This causes a temporary color change in the mineral that we see.

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