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EducationBumble Bee "Jasper"
14th Jun 2017 17:36 UTCKristi Hugs
Mindat states that Bumble Bee "Jasper" is actually a variety of Calcite
Trade name for colorful fibrous calcite found at Mount Papandayan, West Java, Indonesia. The material is made of radially grown fibrous calcite with a distinctive yellow, orange and black banding. "Jasper" is a misnomer, as it contains no or only very little quartz.
HOWEVER, many of the vendors I have spoken with state that it is a silicon based mineral that contains poisonous arsenic (like orpiment).
So either it needs to be handled carefully (if you believe the vendors) or it is a calcite that does not.
I am sure I am missing something here. Can you help me to clarify? thank you!!
14th Jun 2017 18:01 UTCDoug Schonewald
https://www.gia.edu/gems-gemology/summer-2014-gemnews-bumble-bee-jasper-indonesia
14th Jun 2017 18:12 UTCKristi Hugs
14th Jun 2017 19:56 UTCReiner Mielke Expert
14th Jun 2017 20:19 UTCKristi Hugs
It was also suggested elsewhere that the orange, yellow, and black material was formed from a mixture of Indonesian volcano lava and sediment. The lava and sediment contain arsenic. Not sure how calcite comes into play there, but I will keep looking!
14th Jun 2017 22:44 UTCGary Weinstein
Hope this helps.
Gary
14th Jun 2017 22:52 UTCKristi Hugs
14th Jun 2017 23:29 UTCWayne Corwin
14th Jun 2017 23:37 UTCKristi Hugs
Bumble Bee Jasper - This is technically NOT a Jasper (or IS it? The jury is still out) but since many vendors sell it as such, I have added it here for teaching purposes. The term jasper is a misnomer. This vibrantly colored orange, yellow, and black material was formed from a mixture of Indonesian volcano lava and sediment. Further inquiries reveal that it may contain hematite, sulfur, ilmenite and other mineral inclusions INCLUDING ARSENIC.
(Although one website/seller stated it may contain anhydrite-- which would verify the calcite part. But it was only one website out of the two dozen I have read so far).
It is also referred to Fumarolic or Fumarole Jasper. At the Tucson show a few years back, the GIA reported that it was also being sold as "Eclipse" Jasper. Those pieces containing sulphur may fluoresce under a black light.
**CAUTION!! ALWAYS wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.**
15th Jun 2017 00:18 UTCWayne Corwin
And since when is a jasper something other than a variety of quartz ???
Have I had my head in a pocket too long ???
15th Jun 2017 01:13 UTCKristi Hugs
15th Jun 2017 02:18 UTCAlfredo Petrov Manager
It is not jasper, nor anything related to silica at all; it is limestone, composed mainly of calcite. The coloring matter is realgar, As2S2, not orpiment, despite what the yellow color might suggest. (Remember that it's extremely finely divided, and the streak color of realgar is yellow-orange.)
As for its safety, as usual in the case of ornamental stones containing toxic elements (eg: malachite, etc), it is harmless unless ingested. So it's no danger to the collector, but I wouldn't want to be the poor bastard who cuts and polishes it. (I wouldn't even want to be his neighbor.)
15th Jun 2017 02:24 UTCKristi Hugs
15th Jun 2017 02:48 UTCAlfredo Petrov Manager
15th Jun 2017 03:13 UTCKristi Hugs
15th Jun 2017 21:27 UTCEd Clopton 🌟 Expert
16th Jun 2017 01:41 UTCDavid Sheumack
16th Jun 2017 01:58 UTCKristi Hugs
16th Jun 2017 02:07 UTCDavid Sheumack
16th Jun 2017 02:08 UTCAlfredo Petrov Manager
I very much doubt that the material comes from the volcano itself. You don't normally find calcite in a volcano! I suppose the Indonesians merely use the volcano as a convenient nearby landmark, and "nearby" is a rather fuzzy concept ;))
28th Sep 2017 13:09 UTCStone Mania
Thanks for getting to the bottom of this, now to adjust the blurb on my website that I've written about this stone. Oh by the way, Eclipse Stone is a name that originated in Jaipur in India where they cut huge volumes of cabochons for use in gemstone jewellery. They often make up their own names for stones over there, they call Kambaba Jasper, Star Galaxy Jasper!
Regards,
Laurence
28th Sep 2017 16:37 UTCDoug Schonewald
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 26, 2024 05:29:14