Great South Gems & Minerals
• Zeolites • (India)
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• Zeolites •
zeoilte - heulandite -
prehnite - apophyllite - stilbite - calcite
12-Piece flat of beautiful zeolite specimens. The 12 specimens are
all different. Represented in these flats will be heulandite,
prehnite, apophyllite, stilbite, & calcite, in an array of color and
crystal formations. All large fist-size specimens - easily valued at
between $7.50 and $10.00 each. Take advantage of this special offer
of only $2.88 each. A real bargain.
The zeolites are a popular group of minerals for collectors and an
important group of minerals for industrial and other purposes. They
combine rarity, beauty, complexity and unique crystal habits.
Typically forming in the cavities, or vesicles, of volcanic rocks,
zeolites are the result of very low grade metamorphism. Some form
from just subtle amounts of heat and pressure and can just barely be
called metamorphic while others are found in obviously metamorphic regimes.
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Zeolites are hydrated aluminosilicates of the alkaline and
alkaline-earth metals. About 40 natural zeolites have been
identified during the past 200 years; the most common are analcime,
chabazite, clinoptilolite, erionite, ferrierite, heulandite,
laumontite, mordenite, and phillipsite.
For further reading on ZEOLITES
see: en.wikipedia.org/wiki/Zeolite and
www.mindat.org/min-4395.html
Price: $34.50 (12 Pc.)
Dealer Price: $17.25 |
| BTF-1501 Zeolites (India) |
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(OUT OF STOCK)
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