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Understanding quart polishing problems.
This is part of a letter from a very good rough dealer I deal with.
“Firstly, it’s important to clarify that Rosa de France quartz has inherent structural characteristics that can present challenges during the polishing process. Quartz is not typically “cooked” in a way that alters its atomic structure unless subjected to extreme and highly controlled lab conditions, which are uncommon in commercially available rough quartz.
The difficulty you experienced with polishing may be related to one or more of the following factors:
– Natural Inclusions or Microfractures: Many quartz specimens naturally contain internal flaws, which can cause inconsistencies in polishing results.
– Heat Treatment Effects: Some stones undergo heat treatments to enhance their color, but when done improperly, it can weaken their structure.
– Polishing Technique and Material: Even with a 3000-grit pre-polish and cerium oxide, achieving a flawless finish on quartz can be challenging if the material has structural issues.” -
3 Replies
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Hello, I am having trouble with a Rose Defrance amethyst polishing, foggy facets and missed polishes.
Im using batt lap with 8000k PCD after precut and pre Polish of 3000k lap any Ideas? Ive checked lap contamination and 3000k pre-polish they seem fine, should I redo 3000k lap and try cerium oxide?-
You can try that. Remember if the stone is full of micro fractures the polish we get may not be what is wanted. With micro fractures, hollow parts as well as inclusions will not polish well.
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