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.
Please Note: 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).
Most cabochons and freeforms have a rough-ground back (unpolished).
Hardystonite, Calcite, & Willemite
Franklin, New Jersey
A 3-color Franklin fluorescent cabochon.
Height approx. 2 1/4"
Width approx. 1 3/8"
Max. thickness approx. 5/16"
Wt.: approx 23 grams
The andradite (NF) in this piece is somewhat granular-crystalline; the piece should be handled carefully. Back of cab (unpolished) could probably be sealed with epoxy to strengthen it for jewelry use, but we'll leave that up to you.
#CT1123 .... $49.00
Willemite & Calcite
The willemite is in NF bustamite or rhodonite; probably bustamite, as it has a more striated or fibrous appearance. In daylight, the material is a mixture of tan and pink.
Size: max. dimensions approx. 40 x 40 x 17 millimeters
Wt.: approx. 35 grams
#CT1124 ... $32.00
Willemite & Calcite with Glaucochroite
Glaucochroite is non-fluorescent but has a color-change effect in white light. In white fluorescent light, it's blue-gray; under incandescent light it appears pinkish (like rhodonite).
The willemite is dispersed within the glaucochroite, making it appear fluorescent green in SW UV.
The calcite FL somewhat better than the picture shows, making this a 2-color FL piece.
The material was field collected on the Buckwheat some years ago. Glaucochroite is a rare mineral.
Size: max. dimensions approx. 50 x 28 x 6mm
Wt. approx. 22 grams
#CT1125 ... $43.00
(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