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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
EMERALD 7.4x6.4 Octagonal 1.36cts Bright Green
EMERALD 7.4x6.4 Octagonal 1.36cts Bright Green
Cabochon 18x13 MALACHITE
Cabochon 18x13 MALACHITE
Cabochon 14x10 Red and Green MOSS AGATE
Cabochon 14x10 Red and Green MOSS AGATE
Tumbled Gem Mix Average 10-15mm 5kg Bag
Tumbled Gem Mix Average 10-15mm 5kg Bag
Ameritool 4/5inch Saw (220v) with 4inch Blade & Vice
Ameritool 4/5inch Saw (220v) with 4inch Blade & Vice
Cabochon Freeform Rutilated Quartz Box of 4(18)
Cabochon Freeform Rutilated Quartz Box of 4(18)
Cabochon 16x12 oval RED TIGEREYE
Cabochon 16x12 oval RED TIGEREYE
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. July 2018