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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)

Ruby Corundum Crystal average 1cm Brazil (carded)

Ruby Corundum Crystal  average 1cm Brazil (carded)
Ruby Corundum Crystal average 1cm Brazil (carded)
Ref: 23-871
Rubies are a form of corundum, which is the second hardest mineral after diamond. The most valued are clear, deep red - termed "pigeon's blood". Some rubies display a star when illuminated because of an effect called asterism. Asterism is caused by inclusions, which are needle-like extensions of other mineral crystals (such as rutile) trapped within the primary stone. Many stones that are not rubies are nevertheless called rubies. The balas, or balas ruby, for example, is a type of spinel; the Bohemian ruby is rose quartz; the Siberian ruby is red or pink tourmaline; others are varieties of garnet.
Synthetic rubies are used as gems, but most of the production is used in the manufacture of watches and instruments. Ruby is the Birthstone for July. This crystal is from Brazil.
Price per crystal:
1.23 (1.48 Inc. VAT)view the price in UK Poundsview the price in eurosview the price in US Dollars

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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