Treatment- While amethyst is a naturally occurring stone, clear quartz can be treated with irridation to make it look like amethyst.It indicates it's not readily scratched and can only be harmed by more difficult materials. Hardness- Another thing to keep in mind is that amethyst is a slightly tougher stone, with a Mohs hardness rating of 7.Mall jewellers or small family jewellery shops frequently use this quality in beautiful jewellery. They're light to medium purple and contain a heavy to moderate amount of inclusion. AA- These are the top 50% to 75% of natural amethysts on the market.Leading independent/family jewellers frequently employ them in fine jewellery. They are moderate to somewhat incorporated and have a medium-dark purple colour. AAA- These are the top 20% to 30% of natural amethysts on the market.They are eye-clean and brilliant-cut, with a characteristic medium-dark purple colour. AAAA- These are the top 10% of natural amethysts on the market. Grading- if you buy the best quality amethyst, you should also consider the grading system.Amethyst is also widely available in calibrated cuts, which are carefully cut to typical industry sizes and come in various qualities. Because the price per carat does not increase drastically with increased size, it is popular as a large centre stone. Carat weight- Amethyst comes in a wide range of sizes, allowing it to be used in various jewellery styles.Other cuts and carvings, such as carvings of animals and other items, can also be found. They can have concave faceting, which is when flat facets have a concave form. These "dream" or "designer" cuts can be mass-produced or handcrafted as one-of-a-kind items. This can be done by hand or by using an automated cutting system. Amethyst is also a popular gem for freeform cutting into a variety of shapes. Brilliant cuts, triangular and kite-shaped facet arrangements, step cuts, rows of concentric parallel facets, and mixed cuts, which incorporate both facet arrangements, are the most common facet patterns. Rounds, ovals, pears, emerald cuts, triangles, marquises, cushions, and other shapes are among them. Cut- Amethyst may be carved into many different shapes and designs.Fracture-filling treatment of surface-reaching cracks in amethyst is rarely used to improve visual clarity. Cabochons and beads with good colour and clarity command a higher price. Cut as cabochons or fashioned into beads, amethysts with eye-visible inclusions but appealing hues are common. Material of the same colour that is clean to the eye is more valued. However, with a faceted stone, this is acceptable given to its stunning hue. It has a higher percentage of inclusions than Brazilian material. A highly intense raspberry colour can be seen in African material, particularly from Zambia. Clarity- The majority of faceted amethyst on the market is eye-clean, which means it doesn't have any obvious inclusions.The colour purple has been dyed into lower-quality light-coloured amethyst and even light-coloured quartz. The colour of exceptionally dark amethyst can be lightened with heat treatment. The value of these stones is lowered as a result of these causes. Many amethysts are either light or have significant zones of lighter and darker purple colour. Colour zoning can be seen by laying loose amethysts on a table against a white background. Any reddish or bronze-coloured tints in an amethyst's purple colour, as well as any visible colour zoning, substantially reduce its value. In low-light situations, an amethyst may appear black if the hue is excessively dark. Dealers prefer reddish-purple with a lot of saturation to dark purple with a lot of darkness, as long as the stone isn't too dark.
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