Check the emerald with a loupe using reflected light to check for cracks and inclusions.
What does an emerald look like.
Cracks look like little hairs or threads on the plane of a facet.
Look online for a chelsea filter a synthetic emerald filter and a synthetic emerald support filter.
These last two are sold as hanneman filters and may be available in a pair.
Emeralds with many flaws and cracks around the corners aren t good candidates for setting in jewelry.
The fracture filling materials contain very similar refractive indices to the emerald optically hiding the underlying flaw.
Oiling is preformed by heating the emeralds in a cylinder containing the oil which allows it to penetrate through the heat.
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.
Most emeralds are highly included so their toughness resistance to breakage is classified as generally poor.
Even if they can be set without damage they aren t likely to last long in the setting.
Emerald is a cyclosilicate.
Emerald is usually a fractured stone that does not have the alluvial durability to persist great distances from its source.
White or clear is the most common color of topaz.
All three filters together could cost 60 usd or more so this may not be worth it for a single stone.
Emerald flaws are very often concealed by treating a stone with oil or synthetic lubricants.
Emerald also has a specific gravity of 2 7 to 2 8 which is not significantly different from quartz feldspar and other common materials found in stream sediments.
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.
Beryl has a hardness of 7 5 8 on the mohs scale.
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.