click to enlarge:
Howardite aka Rattlesnake Jasper designer gem 3/19/2018 01 -
48 x 22 x 4.3 mm - 29 carats - This stunning cab is cut from
one of the most rare and sought after semi-precious stones
in the world. The material is said to be an agatized/silicified/opalized
tuff of which the location of the deposit is apparently lost
or mined out, nobody seems to know exactly. It has been
thought to come from northern Nevada. John Sinkankas
mentioned in the book "Gemstones of North America" (1959)
that this material was more like chert and that it came from
California (shown in a photo with other California agates).
Regardless of locality it is some of the rarest lapidary
materials available. This wonderful designer drop marquis
shaped gem features a beautifully rounded low dome, girdled
sides and a flat beveled back all with high gloss luster.
There are some surface voids - mostly on the back - that do
not detract from the quality or beauty of the stone. This
stone's colorful patterns suspended in nearly transparent
agate make it distinctive and uniquely attractive. This is a
very rare, high grade and world class cab of this illusive
stone. It is also my best Howardite gem to date. Here is a
video clip to see the stone in motion:
https://youtu.be/slhgPQXJO5c $225.00 shipped to USA -
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