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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |