I am a new customer of your jewelry. I recently bought the Aquamarine necklace,and earrings they are very nice. I also bought the reversible bracelet of turquoise and rainbow Calsilica and was very pleased with that also until someone told me the rainbow calsilica is not a gem but also called motor agate, fordite, Detroit agate. Through some research it is just layers of paint usually from a auto plant. It is pretty but I am concerned about wearing it if there is lead or who knows what in it. Is this true ??? I was under the impression that I was buying a mined gem.
After doing extensive research, I do not believe Rainbow Calsilica is a mined stone. The OP is correct regarding Rainbow Calsilica known as Fordite (named because of Ford Motor Company and Detroit Agate (Motor City), and has a valid concern regarding health risks associated with this stone. If you Google any of the above, you’ll find quite a bit of information on the subject. Now, I don’t believe everything I read on the Internet, but I do believe this one. Auto factories used a painting process on the assembly line causing paint to build up on the track creating “Detroit Agate.” Some crafty people chipped away the paint build up and created jewelry and other items. One statement is true about the stone being hard to find because auto factories modernized their painting process and the assembly line is no longer a source for this stone. I found many warnings on the Fordite website regarding health hazards and precautions. I haven’t seen anything about the source being from ceramic or glazed tile overspray but could be another possibility.
I don’t know for certain, but I have read “Rainbow Calsilica” came from a tile factory’s waste drainage area for the liquids they used to make ceramic or porcelain tiles from.
Now, I’m not feeling very bright tonight and I don’t have a scientific kind of mind, but I am here wracking my brain trying to figure some of this stuff out, haha.
Things such as…
I’ve worked with ceramic and porcelain slip, which is the liquid clay which is poured into a plaster mold, to form “greenware” (fragile, unfired) items. The slip itself can be colored, but I have never seen any slip that fired with the vivid colors that the Rainbow Calsilica has. Plus, I don’t know why surplus slip would be discarded on the ground. Then again, why not. It came from the earth, I guess it might as well go back there.
Then I thought it might be discarded glaze, since it has such vivid colors, but that doesn’t make any sense either, since the glaze, when applied to ceramic, is liquid glass. Glazes come out with a gloss or satin finish, once fired.
If either dried slip or dried glaze were cut and polished, I can’t imagine either being durable enough to form a finished ‘stone’ from.
Will someone please put me out of my misery about this stuff? lol
I would love to know the whole story on Rainbow Calsilica.
Brenda, it’s basically resin with colors added. It’s not a gemstone but I wouldn’t worry about lead, doubtful it contains lead.
My jeweler said it is a mix of Calcite, artificial coloring pigments ( ex: PB15 ), and Silica. BLAH, BLAH, BLAH, BLAH, Blah….I can’t remember Everything he said. I DO remember He said, basically it is carbonate rock that is artificially colored and stabilized with Plastics. Now, I don’t know if that is what is in Your bracelet for sure, but you might be on to something???…
Posted in Jewelry
07.21.17 12:47 PM