Revised Maintenance Protocols The Gemological Institute of America (GIA) and the American Gem Trade Association (AGTA) have released updated care guidelines for 2026, specifically targeting treated gemstones. As emerald oiling and resin-filling techniques become more sophisticated, the risk of damage during routine cleaning has increased. Standard ultrasonic and steam cleaning methods, once considered safe for certain stones, are now being discouraged for a wider range of gems. ### Critical Care Updates 1. Ultrasonic Risks: New high-frequency ultrasonic cleaners can cause resin fillers to vibrate out of emerald fractures or, in worse cases, cause the stone to shatter due to internal pressure differences. 2. Solvent Sensitivity: Many modern resins used in fracture filling are sensitive to the alcohols and detergents found in common jewelry cleaning solutions. 3. Storage Recommendations: For luxury pieces, the new standard recommends micro-climate storage to prevent the drying out of oils in emeralds and opals. 4. Professional Inspection: The industry now recommends a 'bi-annual' professional inspection for all fracture-filled stones to check the stability of the treatment. ### What this means for Mallard & Co. Our service department must immediately update its intake procedures. Before any emerald or suspected fracture-filled stone is cleaned, it must undergo a microscopic inspection to identify the type of filler. Sales associates should provide every emerald purchaser with a 'Luxury Care Kit' that includes only PH-neutral, non-alcoholic cleaners and a soft-bristled brush, emphasizing that these stones should never be placed in home ultrasonic machines. This proactive advice builds trust and protects the store from liability.
Sources: GIA, AGTA, Professional Jeweler