Deep Royal Blue Sapphire is the most saturated and intense variety of sapphire, characterized by an exceptionally deep, saturated blue color that evokes absolute royalty and timeless elegance. This ultra-rich, intense, and pure blue shade represents the ultimate ideal of fine blue sapphire.
9硬度（满分10）
Corundum所属矿物族
Standard Heat TreatmentHigh-temperature heat treatment (1600-1800°C) is applied to over 95% of Deep Royal Blue Sapphires. This permanent process improves color by dissolving rutile inclusions and intensifies the deep blue. Widely accepted in the market, it must nonetheless be mentioned in gemological certificates.
Untreated / NaturalUntreated Deep Royal Blue Sapphires are extremely rare (less than 5% of the market) and highly prized by collectors. Their rarity and natural beauty give them significantly higher value. A prestigious laboratory certificate (GIA, GRS, SSEF, Gübelin) is essential to confirm the absence of treatment.
Beryllium DiffusionControversial treatment that introduces beryllium into the stone at high temperature to modify or intensify color. This treatment significantly affects value (70-90% reduction) and must be systematically disclosed. Detectable by specialized laboratory analysis.
