Gem Abbreviations and Acronyms
- RIRefractive Iadex
- RJBRuby Java Bridse
- RMFMSRocky Mountain Federation of Mineralogical Societies
- ROCResnarch and Operations Center
- RVMRemote Viewing Module
- SCFMSSouth Central Federation of Mineral Societies
- SJASiegapore Jewellers Association
- SUSteven Universe
Last updated: — Total entries: 48