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Related articles Corundum Identification of Surface Diffused Synthetic blue Sapphire Lead Glass Ruby Identification (Composite Ruby) More related articles Inclusions in corundum Synthesis and Simulation in corundum

Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. inclusions in wood opal  Iron sulfide in opal fern like a holographic play of colour patterns in opal  pyrite inclusions in opal Iron oxide in opal opal from USA Clay mineral along with pyrite in opal Play of colour in opal  Manganese oxide flower in opal  Iron oxide in opal Chalcedony along with amphibole needles in opal  Green opal Manganese oxide in opal  Manganese oxide in opal  fluorite inclusions in opal  opal from Ethiopia  wood in opal  Agate like banding pattern in opal  Leopard opal  Conk opal  The same slides are in the form of video uploaded on youtube.  Related articles Petroleum Quartz Quartz's inner world Uncovering The Hidden Bea...

Since 2015 a large quantity of a new blue diffused synthetic sapphire has appeared in the world market.  In immersion of blue diffused sapphires showed the “spiders’ web effect” – a cut-related colouration pattern – and rather high titanium content on the surface of the samples. The synthetic blue sapphire usually displayed strong chalky blue fluorescence to SWUV lamp and mostly have cure bands and residue or gas bubble under the microscope.  residue  & gas bubbles in synthetic diffused sapphire residue  & gas bubbles in synthetic diffused sapphire colour concentration on the facets edges easily seen  colour concentration on the facets edges easily seen  colour concentration on the facets edges easily seen  When viewing the stones in methylene iodide solution with diffused-transmitted white light, blue diffused synthetic stones clearly display a “spiders’ web effect” Related articles Treatments of Ruby and Sapphire by John Koivula Unheated Cor...

The following Post " Unheated Corundum (ruby & Sapphire) inclusions" are only for unheated ruby & Sapphire inclusions.  A beautiful zoned of fine exsolved particles in unheated ruby. origin Madagascar. A beautiful zoned of fine exsolved particles in unheated ruby. origin Madagascar. Trapiche in Corundum, Origin: Pakistan Trapiche in Corundum, Origin: Pakistan Trapiche in Corundum, Origin: Pakistan Trapiche in Corundum, Origin: Pakistan Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Unheated inclusions in Sapphire, Origin: Kashmir, Pakistan. Un...