Lapidary preformed cabochon slab Bertrandite (Tiffany Stone, Opal Fluorite), 38x28x7.5 mm, ready to finish, no pits or open fractures. 0037

Lapidary slabs preformed by DesignsbyShirl in Windsor, Calif. My small to medium slabs are rare, scarce or unique and one of a kind. They are preformed by sanding and shaping them. They have flat backs and fronts, all sides are smoothed with 600 diamond grit to make it easier for you to finish. Most have a nice glow or bright finish so you can use them asis in jewelry, or as a specimen, if stand is shown it's included free.

$4.99 maximum shipping cost when I ship any package, includes insurance..

PREFORMED SLAB DESCRIPTIONS:

BERTRANDITE (aka Tiffany Stone, Opal Fluorite). Red, black, white, and gray, preformed sanded smoooth with 600 grit to make it easier for you to finish. Unique and rare natural stone, no pits or open fractures. 1 naturally sealed fracture line. Hardness 6.5 - 7. It and it has a nice shine produced with the 600 grit so it can be used asis. Black stand is included.

The major ore of Bertrandite is beryllium, and the major deposits of beryllium in the United States were in the Spor Mountains of Utah. Brush Wellman, Inc. bought the mineral rights to these deposits and began mining in the 1960's. As of today I don't know if these mines are still open or covered over by the Government because they are considered dangerous. This material was not available to the general public when I was collecting more the 15 years ago, mainly because the value of beryllium was high. Two types of this material I know exist are opalized fluorite and agatized fluorite (like this rough slab).

INFO ON SLABS
Use my pictures with the 10 x 10 mm background squares and the 18 mm dime to help with size visualization. All pictures show a slab that has been given a nice glow or bright polish from 600-1500 diamond grit, some even have a mirror polish.

I try to eliminate all the pits and open fractures and I smooth all sides. I will note anything I couldn't remove. Your going to get a slab that is going to be easy to finish or use asis. I preform the slabs by sanding and shaping them with 120 to 600 diamond grit and sometimes up to 1500 grit, by removing all grit lines before the next stage in sanding gives the slab a superior looking finish and makes it ready for the next step. My preform really helps you cut down the time it takes you to finish these slabs. No waste to deal with.

FINISHING SLABS: If you want to finish the slab(s), I have posted my recommendation on how to do this, see my website blog on https://Designsbyshirl.patternbyetsy.com. (until Etsy allows clickable links to the Pattern shops you have to cut and paste or type the name into another window).

100% money back guarantee for any reason. We pay for the return shipping if the item has a fault or the description was wrong. Buyer pays return shipping cost if it's not our fault.

Etsy will collect a sales tax if your state has a tax law requiring it, it will be added on at checkout and sent to your state.

It's insured when lost. We are not responsible if tracking shows it was delivered to your address.

If you need more info on any slab send us a note. Contact us if you have any special requests. No returns on any slabs you have us modify.

Our shop is available on Etsy and available as a Etsy Pattern website on the internet, https://Designsbyshirl.patternbyetsy.com. We are located in Windsor, California.

Thank you for viewing our shop, you won't be sorry if you make a purchase.
Bruce and Shirl