Treatments of Ruby and Sapphire by John Koivula
Posts
Inclusions in Natural opal
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.
Identification of Surface Diffused Synthetic blue Sapphire
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”
Unheated Corundum (Ruby & Sapphire) Inclusions
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...