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Rare, Exotic, and REE Cabochons- this section has cabs of the most exotic and seldom-encountered materials. 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.
What you see is what you get-- item in picture is same one that's for sale. Each cabochon or piece of jewelry is a unique item.
Biotite, Willemite, Andradite, & Rhodonite with minor amounts of Calcite and other minerals - Franklin, New Jersey.
#CT1068 ...SOLD
Cerite
& Toernebohmite with Chalcopyrite - Cerit Gruva, Bastnaes,
Riddarhyttan, Sweden. Tapered, domed cabochon cut from these rare cerium silicate minerals
- high
polish, approx. 1 1/2" tall x 7/8" wide at base x 3/8" wide at
top - has the property of showing dull pink-violet color in sunlight or
incandescent light (as shown in photo) yet shows no color in
fluorescent white light
and appears gray to black. This is about as pronounced a color change
as we've
found in the cerite pieces that were available for cutting.As with
most other
cabs, the back is unpolished. #CT005 ... $30.00 Reduced to $25.00
Hyalophane
& Hancockite with Andradite and Franklinite -
Palmer Shaft, Franklin, New Jersey. Brick-red hancockite in hyalophane
(a
barium feldspar) with tan andradite garnet and black franklinite. High
gloss
polish, teardrop shape. Size is ca. 37 mm tall x 22 mm wide across
largest
dimensions.#CT1061 ... SOLD
Tephroite
with willemite, franklinite, and
zincite. Classic ash-gray tephroite with spots of ruby-red zincite,
black
franklinite, and pink-tan willemite. Franklin Mine, Franklin, NJ. Size
approx.
21 x 17 mm, rectangular. #CT0133 ... SOLD 
Willemite & Leucophoenicite - Franklin, NJ.
Free-form,
six-sided cabochon of green willemite and pink leucophoenicite having
bevelled
edges and flat face. Front and sides are polished, back is unpolished.
The
willemite is of course highly fluorescent in SW. Max dimensions approx.
22 x 17
mm. #CT1038 ... SOLDBrowse our selection of additional cabochons:
Agate and Jasper cabochons
Exotic Mineral cabs
Fluorescent cabochons
Various - other ornamental and semi-precious cabs
Jewelry made from unusual cabochons
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