Druzy Quartz - imitation
This stone is a plastic imitation of treated druzy quartz.
Druzy Quartz - treated
Natural quartz with a coating applied to create an iridescent effect.
"Mystic" or "aurora" stones have a coating applied to create an iridescent effect - usually only on the bottom (pavilion) of the stone.
Sold as natural, this quartz has been dyed various colours, some of which ran when the stone was placed in water.
Sold as "certified", hue enhanced (!) but it is 2 layers of glass with what I can only describe as a layer of tinsel glued between the 2 (air bubble arrowed).
imitation (black "needles" glued between synthetic quartz top and bottom).
This "gemstone" has been found to be pulverised carbonate rock mixed with at least two artists' pigments and stabilised with a polymer.
This is a ruby but an industrial grade one which has been heavily treated and may be 40% (or more) red glass! Look for lines on the facet surfaces. May be described as GF or Glass Filled.
A manmade, synthetic ruby which has the same chemical, physical and optical properties as a natural ruby.
Spotted on the internet - if it's like my trapiche emerald it may be dyed quartz, with the dark trapiche markings drawn on with pen! I'm pretty confident it is not a natural trapiche ruby...
A manmade, synthetic sapphire which has the same chemical, physical and optical properties as a natural sapphire. Can be produced in most colours including colour change.
Natural sapphire crown (top) with synthetic sapphire bottom (pavilion). The join line can be seen along the girdle.
Spotted on the internet - if it's like my trapiche emerald it may be dyed quartz, with the dark trapiche markings drawn on with pen! I'm pretty confident it is not a natural trapiche sapphire...
glass imitation opals.
A manmade, synthetic spinel which has the same chemical, physical and optical properties as a natural spinel. Commonly seen as blue but can be produced in most colours.
is cut from layers of hardened resin which have built up in the process of making surfboards
Blue Topaz/Mother of pearl doublet
has a layer of blue topaz glued to the top of a layer of mother of pearl.
These are synthetic quartz made to imitate watermelon tourmaline (not very well!).
Soude Paraiba Tourmaline
Colourless top and bottom (may be quartz, synthetic spinel, sapphire or beryl) glued together with blue glue. This can clearly be seen from the side.
Chips of turquoise, compressed and bonded together with resin.
is off-white howlite which has been dyed to imitate turquoise.
is off-white magnesite which has been dyed to imitate turquoise.
are a mix of natural or dyed turquoise pieces, set in a metallic effect resin matrix.
Natural turquoise which has been impregnated with resin or plastic to improve its durability.
A manmade material created by sintering (heating and compressing) calcite powder and pigmentation.
is a layer of quartz glued to a layer of turquoise.
A by-product of the iron smelting process in Wales.
None yet but this resource is continually being added to.