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Boulder Opal baroque cabochon 26.5mm x 12.3mm 14.2cts
Boulder Opal baroque cabochon 26.5mm x 12.3mm 14.2cts
Aquamarine Oval Cabochon 9.0 x 7.0
Aquamarine Oval Cabochon 9.0 x 7.0
Hand Crafted 9ct Gold Pendant with Marine Opal.
Hand Crafted 9ct Gold Pendant with Marine Opal.
Cabochon 25x18 MALACHITE
Cabochon 25x18 MALACHITE
Ameritool 6 inch Universal Grinder/Polisher 220v
Ameritool 6 inch Universal Grinder/Polisher 220v
Ameritool 4/5inch Saw (220v) with 4inch Blade & Vice
Ameritool 4/5inch Saw (220v) with 4inch Blade & Vice
Cabochon 18x13 Oval LABRADORITE
Cabochon 18x13 Oval LABRADORITE
OPAL WHITE 18.0 x 13.0 Oval Cabochon 4.9cts Multi
OPAL WHITE 18.0 x 13.0 Oval Cabochon 4.9cts Multi
GEM BOX WHITE Square 25x25x16mm
GEM BOX WHITE Square 25x25x16mm
SPIRATOR VIBRO Large (Incl. Bowl)
SPIRATOR VIBRO Large (Incl. Bowl)

Rough rock for tumble polishing

Rough Rock for Lapidary Ref: IntroRough2
Rough rock does not photograph very well and so to indicate texture, colour etc. we have shown cut stones mostly made from our rough stock.
If the third digit of the code is '0' (i.e.??-0??) then the material will generally be supplied in tumble-polishing size but may still require further reduction in size by breaking with a lump hammer (Wrap stone in sacking to prevent flying 'chips' and also wear protective eye glasses). If the third digit of the code is a '1' (i.e. ??-1??) then the supplied material will generally be larger pieces suitable for cutting with a diamond saw.
HARDNESS;........
Hardness: use a simple 'scratch’ test to determine the approximate hardness of a stone. A stone which can be marked with a pen-knife, but not with glass, must have a hardness somewhere between 5 and 51/2.
Finger nail. 21/2
Penny 3
Broken glass 5
Pen-knife 51/2
(Hardness is shown in ‘Mohs’ units: 10 is hard down to 1 soft.)


Rough Rock for Lapidary

Our stock range, of around 8000 items, covers hobby and professional requirements for craft/workshop/therapy use. E & O E. Copyright: Manchester Minerals Ltd. May 2018