Most emeralds are highly included so their toughness resistance to breakage is classified as generally poor.
What does an emerald look like.
Beryl has a hardness of 7 5 8 on the mohs scale.
Look online for a chelsea filter a synthetic emerald filter and a synthetic emerald support filter.
Emerald is usually a fractured stone that does not have the alluvial durability to persist great distances from its source.
Varieties of the color green may differ in hue chroma also called saturation or intensity or lightness or value tone or brightness or in two or three of these qualities variations in value are also called tints and shades a tint being a green or other hue mixed with white a shade being mixed with black a large selection of these various colors is shown below.
Emerald is a gemstone and a variety of the mineral beryl be 3 al 2 sio 3 6 colored green by trace amounts of chromium and sometimes vanadium.
Emerald flaws are very often concealed by treating a stone with oil or synthetic lubricants.
Like cut emeralds raw emeralds can be transparent or translucent a quality that is sometimes called clarity but in the gem trade is referred to as diaphaneity.
White or clear is the most common color of topaz.
Emerald is a cyclosilicate.
Emeralds with many flaws and cracks around the corners aren t good candidates for setting in jewelry.
Even if they can be set without damage they aren t likely to last long in the setting.
These last two are sold as hanneman filters and may be available in a pair.
This is a common practice in the gemstone industry.
Cracks look like little hairs or threads on the plane of a facet.
Check the emerald with a loupe using reflected light to check for cracks and inclusions.
Oiling is preformed by heating the emeralds in a cylinder containing the oil which allows it to penetrate through the heat.
All three filters together could cost 60 usd or more so this may not be worth it for a single stone.
The fracture filling materials contain very similar refractive indices to the emerald optically hiding the underlying flaw.