According to lab gemologists, natural (quartz/phenakite/topaz) or man-made colorless to near-colorless (glass/syn. cubic zirconia/YAG/GGG/strontium titanate/lithium niobate) rough gem materials have been found in natural diamond parcels in the marketplace to confuse the unwary + if in doubt always consult a reputed gem testing laboratory.
Lab Alert!
http://www.gemlab.net/website/gemlab/fileadmin/user_upload/Research/Gemlab-Newsletter-04-2008-forPDF.pdf
Useful link:
www.gemlab.net
No comments:
Post a Comment