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Fluorescent Minerals For Sale:  Page 2

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.
 
Unless otherwise noted, multiple photos are different views of the same specimen.






Hardystonite with minor Clinohedrite and Willemite - Franklin, NJ.  Practically a solid piece of whitish hardystonite (FL blue-violet SW) with large grains of honey-brown andradite (NF).

Size approx. 2 1/2" x 1 1/8".
Ship wt. 0.5 lb.

#F256 ... SOLD






Hardystonite & Willemite - Franklin, NJ.  Also with minor amts. of clinohedrite (FL orange SW).  Matrix is mostly andradite garnet (NF;  honey-brown in daylight). 

Specimen size approx. 3 7/8 x 2 x 1 3/4 inches
Ship wt. 2 lbs

#F545 ... $49.00






Hydrozincite on Calcite - Franklin, NJ.  The  hydrozincite FL a brilliant blue-white;  the calcite FL bright red-orange (both SW). 

Specimen size approx. 3 1/4" x 2" x 1"
Ship wt. 0.8 lb

#F546 ... $32.00









Norbergite & Diopside - Ogdensburg, NJ.  FL yellow SW (norbergite) and blue-white SW (diopside).  The calcite has a very faint hint of FL response (reddish, SW).

Size:  display face approx. 3 1/4 x 1 7/8 inches (max. dimension).

#F535 ... $18.00
 




click for larger image   Click for larger

Sphalerite & Calcite - Franklin, NJ.  Sphalerite var. "Cleiophane" (fl orange and blue SW / MW / LW / PH).  The sphalerite forms a vein or band in the calcite and has a gray to silvery-gray appearance in daylight.  

Size:  approx. 3 1/4" x 1 3/4" x 1 1/4".
Ship wt. 1 lb.

#F552 ... $28.00




 

Sphalerite & Willemite - Sterling Hill, Ogdensburg, NJ.  This is the variety known as "mahogany sphalerite", FL moderate orange in SW and LW (didn't test MW, but probably good).   

The other side of the piece has a ribbon of sphalerite in willemite that displays better in LW (click here for LW photo).

Brightness:  ++ (sphalerite) / +++ (willemite)
Size:  about 3 1/2" x 1 3/4" x 1 1/8"
Ship. wt. 1 lb.

#F532 ... $25.00




Click for larger image   Click for larger

Willemite & Calcite - Franklin, NJ.  This willemite is in the form of rough crystal shapes in the calcite. 

What's especially interesting is that they appear to be made of both willemite and tephroite, the willemite forming FL green "exsolution lines" within the NF tephroite.  

The crystal shapes are ash-gray with a greasy to vitreous luster;  this is typical for tephroite.  The outer rims are made of red (daylight) willemite.

Some surface contacts and edge dings to the calcite;  specimen is priced accordingly.  However, they don't really have any effect on the FL qualities.

Specimen size approx.  3 1/4 x 2 1/2 x 1 1/2 inches
Ship wt. 1.2 lbs.

#F547 ... $20.00





Click for larger  Click for larger

Click for larger

Willemite
& Calcite with Rhodonite, Andradite, and unidenfied minerals - Franklin, NJ. 

This one has a couple of unidentified silicates.  One of them is a deep reddish-brown mineral with a dull or waxy luster.   It could be friedelite.

Some of the rhodonite (if that's what it is) has an almost platy quality. 

Together, these minerals make for a very interesting daylight specimen (see photos).    The rock is very dense and compact, having several different minerals in various daylight hues of tan, pink, brown, and brick-red.   Overall, they give the specimen that hard-to-define "classic Franklin" appearance.


Specimen size approx. 3 x 2 x 2 inches.
Ship wt. 2 lbs.

#F548 ... $20.00










You are now on Page 2.





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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Related Items

Page 1 - Franklin / Sterling Hill Fluorescents

Page 3 - F/ SH Fluorescents

Page 4 - Various Localities


Fluorescent Cabochons

Fluorescent Sets

Minerals A-L (daylight)

Minerals M-Z (daylight)



Abbreviations:
FL = "fluorescent", "fluoresces", "fluorescence";

LW= "Long-Wave" (ca. 320 to 370 nm);

MW = "Mid-Wave" (ca. 302 to 312 nm);

NF = "Non-Fluorescent"

PH= "Phosphorescent" ( i.e., temporary glow after UV source is removed);

SW= "Short-Wave" (254 nm);

UV= "Ultra-Violet".





Brightness Grades:

+  Weak
(Scapolite, Hyalophane, some Fluorapatite).
Requires a powerful UV lamp and well-adjusted eyes in a darkened room.  Don't ignore this category; some of the nicest color combinations are here.

++  Moderate
(Fluorapatite, Hardystonite, sometimes Microcline).  
Many fl. species fall into this category.

+++
  Intense
(Willemite, Scheelite).  
The fluorescence has an almost electric quality when illuminated with UV.

Brightness Grades are somewhat subjective, but willemite and scheelite are almost always Grade 3 ("+++").