Fluorescent Cabochons - cabs made from minerals that fluoresce in either short-wave (SW) or long-wave (LW) ultraviolet light. Some pieces are free-form and suitable for wire-wrap jewelry or simply for collecting; others (where indicated) are standard sizes for mounting in various jewelry findings.
To see the fluorescent colors, you need a special ultraviolet lamp. For most pieces you will need a Short-Wave (SW) unit, which puts out a wavelength of 254 nanometers.
Item in picture is the same one that's for sale. Each cabochon or piece of jewelry is a unique item.
IMPORTANT: Fluorescent mineral cabochons should be handled as delicate objects. The ores and other rocks that typically contain fluorescent minerals are not as tough or durable as, for example, agates or jaspers. Take care not to drop your cabochons onto any hard surface or otherwise subject them to rough handling.
When handling or examining any exotic mineral cabochon, do so very close to the surface of the table in case you drop it. We suggest laying out a pad or folded-up towel on the viewing area, as should be done for handling any other gemstone. If you put cabochons in a display case, do not leave them in direct sunlight (expansion / contraction).
Hardystonite, Calcite, & Willemite - Franklin, New Jersey.
Very large, freestanding display piece. Only the front is polished. Back is mostly rough natural; cut in such a way as to conserve the most fluorescent material. Vivid 3-color fluorescence in SW UV: red (calcite), green (willemite) and blue-violet (hardystonite).
Size: Height approx 60mm; Width (max) approx. 44 mm. Thickness (max) approx. 1 cm.
Weight: apprx. 73 grams
Medium to high-gloss polish.
#CT1122 ... SOLD
Hyalophane with Margarosanite - Franklin, NJ.
The matrix is andradite & franklinite (nf) with hyalophane (fl dull magenta sw).
There is a spot of margarosanite (rare; fl brilliant blue-white sw).
Size: Height about 42mm. Width at base about 36mm.
Weight: about 33.8 grams
Freeform decorative piece, made to stand upright on its own. Medium-gloss / satin polish.
#CT1121 ... $49.00
Willemite & Calcite with Franklinite - Franklin, NJ. There are minor amounts of a dark pinkish mineral that could be leucophoenicite, or perhaps tephroite.
A miniature monolith... a free-standing polished decorative stone for your fluorescent display case. Medium-gloss / satin polish.
Size: Height is about 50 millimeters (approx. 2 inches). Width at halfway point is approx. 21 mm (about 8/10 of an inch). Depth is about 14 mm.
Weight is about 42.5 grams (about 1.5 ounces).
#CT1120 ... SOLD
Willemite & Calcite - Franklin, NJ. Angular freeform. This willemite is green in natural sunlight due to FL response caused by the sun's UV. Perhaps not coincidentally, it is also FL in LW to a considerable extent, though it is brighter and more vivid in SW.
FL photo shows piece in SW. (Normal-light photo here.)
Size: about 33 mm (widest) x about 40 mm (tallest).
(Page 1) (Page 2) (Page 3) - Franklin / Sterling Hill
(Page 4) - Various Localities
Browse our selection of additional cabochons....
Agate and Jasper cabochons
Exotic Mineral cabs
Fluorescent cabochons (you are on that page now)
Various - other ornamental and semi-precious cabs
Jewelry made from unusual cabochons