4-Color Hardystonite, Clinohedrite, Willemite, Calcite – Franklin Mine, New Jersey

$0.00 USD

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SKU: MSJ0347
Weight and Dimensions

4lb 13.1 oz, 7 1/2" x 5" x 3"

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2-5 Business Days

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A spectacular 4-color rock from the famous Franklin Mine. Large and beautiful deep violet-blue hardystonite from the famous Franklin Mine. This is a spectacular specimen also containing orange clinohedrite, reddish-orange calcite, green willemite, and non-fluorescent franklinite. Full of rich color.

The orange clinohedrite is nicely phosphorescent as shown in the images.

The Franklin and Sterling Hill mines in New Jersey are famous around the world for their bright and colorful fluorescent minerals. In fact, this area has been deemed the “Fluorescent Mineral Capital of the World”.

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Fluorescent minerals can be fascinating to those who discover these hidden treasures and they often raise various questions. Here are some common questions related to fluorescent minerals.
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purple fluorite crystals

MINERAL OF THE MONTH: FLUORITE

Fluorite often times has bright fluorescence under ultraviolet light, revealing bright colors that range from purples and blues to brilliant greens and pinks. Anyone with a fluorescent mineral collection probably has a piece of fluorescent blue fluorite, the most common fluorescent color for this mineral.
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calcite, hydrozincite, aragonite, diopside specimen under UV light

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The sun was slowly setting so we made dinner and relaxed a while (amazing how slowly the sun sets when you're waiting for it). Once it got dark collected started in earnest. The first thing you notice is the bright blue hydrozincite everywhere on red calcite. All of the small rocks glow. We proceeded to check out the large boulders laying around on the surface and quickly determined that dozens of prior collectors had done the same. That's why they're still lying around.
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