Bertrandite (aka Opal Fluorite, Tiffany Stone) 6.2 oz,, natural stone (rs42091)
Bertrandite aka Tiffany Stone and Opal Fluorite rough slab
Characteristics: Purple and Lavender tones. Unfinished natural slab, smooth cut. No pits or open fractures., some naturally sealed fractures.
A major ore of Bertrandite is beryllium, and the major deposits of beryllium in the United States are in the Spor Mountains of Utah. Brush Wellman, Inc. bought the mineral rights to these deposits and began mining in the 1960's. Until recently this material was not available to the general public because the value of beryllium was high. For some reason it became more abundant in Arizona the last several years. Two types of this material exist, one is the opal fluorite type(tiffany stone) along with an agatized material. This I would call opalized.
Approx size: irregular 6 1/2" x 4" x 5 mm, Weight: 6.2 oz
Combining items with 2 or more listings. If they will fit in a standard package I will ship them in it with no extra charges, just additional postage if needed.
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Preformed slabs: My slabs have all or most of the pits and open fractures removed to produce a more acceptable slab for you to finish. The front and back have been smoothed.
Finishing purchased slabs: My recommendations are for you to start with 325 diamond grit, change to 220 if 325 is not removing grit lines, and finish with 600 grit before polishing. I have created several posts that show how I create cabs, see my website blog on Designsbyshirl.
My pictures: I use a full spectrum 45 w light bulb - photography photo CFL 5500K. It's a daylight balanced pure white light.
My first 2 pictures (front and back) show items wet, this brings out the colors you should see in a finished product. Other pictures show items dry, this should show imperfections (small cracks or pits) if there are any. Contact us if you have any questions. Translucent items will have at least one picture taken with a backlight.
An 18 mm dime or 24mm quarter and 10 mm background squares in some pictures should help you with image sizing.
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