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Techniques for CollectorsInternal crystal fractures
16th Dec 2015 01:48 UTCBob Harman
So my questions involve these visible internal fracture planes; in and of themselves, do they affect a specimen's value? And in high end examples of any mineral specimens can they be treated to minimize their appearance, even tho they don't reach the crystal surface? Any help with this?? CHEERS.......BOB
16th Dec 2015 04:55 UTCJohn Attard Expert
Any attempt at covering it up, strengthening it or anything is also detrimental. All you can do is to protect it especially from thermal shock. Once I saw at Tucson a mineral dealer unpacking a large lot of impeccably faceted clear transparent calcite crystals that had stood a cold flight from Brazil. Unfortunately it was rather late before he realized that all his crystals were developing internal fractures as he put them on the display shelf. There was a "feeding frenzy" with buyers asking "let's see some more". He should probably have kicked everybody out and waited till the lot has equilibrated to room temperature while still packaged.
Bob that is a nice piece!
16th Dec 2015 15:37 UTCRob Woodside 🌟 Manager
Just as jewelers want clean gemstones so do mineral collectors.
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 6, 2024 20:35:18