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Fluorite & Galena

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LJM725743

Fluorite & Galena

Ex. Leo Jahaan Collection
Classic Locality

Description Tabs

Description
Locality: 
Rogerley Mine, Frosterley, Weardale, County Durham, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.7 × 6.5 × 4.3 cm
Weight: 
265.00gr
Description

Here is a classic specimen of daylight-fluorescent fluorite from the famous Rogerley mine in the UK.

Daylight-fluorescent fluorite is highly UV-reactive, so that the color changes dramatically from sunlight alone, requiring no additional UV lamp.

In this case the pure green crystals obtain a vibrant blue especially around their edges.  With the addition of a UV lamp the entire specimen changes to an intensely bright blue, more extreme than photos can capture.

The crystals are translucent, including some very gemmy with interpenetrating twins and fascinating growth patterns on the surface.

There are also multiple matte-gray octahedral galena crystals interspersed.

A very fine display specimen and perfect representation for this locality.

Ex. Collection of Leo Jahaan

Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey
Video

Daylight-Fluorescent Fluorite from Weardale (Ultraviolet)

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Please read the dimensions of the specimen, as the size of minerals in photos can be misleading.

To see the details shown in close-up macro photos, you may require a high quality magnifying glass or jeweler's loupe.

Care has been taken to accurately display the colors of the specimen. However, please be aware that computer monitors and phone screens each display colors slightly differently. Differences in light brightness and light source can also drastically alter the appearance of mineral colors. Therefore please be aware that while these photos are accurate and colors have not been enhanced, what you see on your screen may vary slightly from what you see in your hand, and may require specific lighting conditions (usually brighter is better).

Information regarding the specimen's found locality and mineral identification is believed to be correct, however due to the complexities of ID'ing minerals and tracking source locations in rare cases this data may be imprecise.

If you have any questions or concerns please don't hesitate to send a message.

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