Fluorescent Minerals For Sale:  Page 5

Franklin & Sterling Hill

Important:  Fluorescent minerals require a special ultraviolet lamp to view them (normally, a short-wave UV lamp).  It's worth it to get a good lamp.

The color response of your computer's monitor may not be the best representation of the photographs. The colors shown in the photos, at least as they appear on our office monitor, are the most accurate representations we were able to capture with the limitations of the camera.
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Hardystonite, etc. - Franklin, NJ. (#F595)

A three-piece lot of fluorescent specimens, each containing hardystonite (FL blue-violet SW).  The other colors shown are willemite (FL green SW) and calcite (FL red SW).  One of the specimens has mica with the hardystonite;  it is somewhat rare to have these two minerals in the same assemblage.

Sizes:  The widest specimen is about 3 inches across.  The others are about 2" to 2 1/4" across the maximum dimension.

Ship. wt.:  1.5 lbs.

#F595... SOLD

Willemite - Sterling Hill, Ogdensburg, NJ. (#F592)

The willemite occurs here as a vein or ribbon in franklinite-willemite ore.  The willemite vein consists of whitish to orange willemite having a somewhat bladed or acicular aspect (visible at 10x magnification). 

FL is very bright green in SW UV with strong PH afterward.

Size approx. 3 1/2" x 2 1/4" x 1 1/4".

Ship. wt. 1.5 lbs.

#F592... SOLD

Willemite - Franklin or Sterling Hill. (#F489)

Willemite in highly manganoan Calcite
Franklin or Sterling Hill.

Willemite - FL moderate to bright green SW, also PH
Calcite -  almost NF

This piece was collected years ago at a Franklin mine dump, but there is some controversy over the true origin of this mineral assemblage.  Some old-time collectors insist that it has to be Sterling Hill material that found its way to Franklin.   However, this material has been encountered in at least two or three different sites at Franklin. 

Sterling Hill did have some virtually-identical material.  Sometimes there are pieces that cannot be visually distinguished as Franklin vs. Sterling Hill.

The calcite is so highly manganoan that it doesn't fluoresce much, if at all.  It is also pinkish in daylight, making it resemble kutnahorite or rhodochrosite.   There are traces of LW FL sphalerite, as well. 

A larger specimen, and the best example of this material we've had.

Size approx. 6 1/4 x 2 1/2 x 2 3/4 inches
Ship. wt. 4 lbs.

#F489 ... SOLD

Willemite & Calcite - Sterling Hill. (#F593)

Reddish-tan (daylight) willemite in a matrix of black franklinite (NF) and white calcite (FL red SW).  The large, irregular, NF franklinite grains give the piece a distinctive, almost brecciated appearance in SW UV.

Size approx. 4" x 2 3/4" x 1 1/4".

Ship. wt. 2 lbs.

#F593 ... SOLD

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Fluorescent minerals require a special lamp to view the colors you see in the photos.  Most of the specimens shown above react to short-wave ultraviolet (SW UV or "UV-C"), which has a wavelength of 254 nanometers.



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