"The best-quality rubies come from the Mogok Valley of north-central Burma (Myanmar) and Mong Hsu in northeast Burma." - Cally Oldershaw, GUIDE TO GEMS pg. 67, Copyright 2003 Philip's
Our fine quality natural ruby layout was expertly cut and polished in Burma with heat treatment typically used on ruby mined from this deposit 15 to 20 years ago in Mong Hsu region, northeastern Myanmar (Burma).
These rubies have NOT been treated with lead glass nor other glass composites, not with chemical (lattice and / or bulk) diffusion of any kind as defined by Laboratory Manual Harmonization Committee guidelines used by the world's leading gemological laboratories and associations.
In the spirit of full disclosure of the gemological properties and physical sourcing of our fine rubies from Mong Hsu, Burma (Myanmar), we are pleased to refer you to the following gemological technical paper (note - this is a 25 page PDF document) published by the Gemological Institute of America, https://www.gia.edu/cs/Satellite?blobcol=gfile&blobheader=application%2Fpdf&blobheadername1=Content-Disposition&blobheadername2=MDT-Type&blobheadername3=Content-Type&blobheadervalue1=attachment%3B+filename%3DRubies-from-Mong-Hsu&blobheadervalue2=abinary%3B+charset%3DUTF-8&blobheadervalue3=application%2Funknown&blobkey=id&blobtable=GIA_DocumentFile&blobwhere=1355958328769&ssbinary=true
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Please don't hesitate to contact us for any questions through etsy message or noritajewelrybox [!at] gmail.com