The X-ray fluorescence (XRF) analysis of this Byzantine gold ring confirms its composition as 21 ct gold, indicating a purity that aligns with the opulent standards of the era. The absence of modern trace elements suggests the ring's authenticity, enhancing its value. The presence of a high-quality blue sapphire, set within a classic Byzantine bezel, completes this piece's luxurious profile. This combination of gold and gemstone is not only emblematic of the period's craftsmanship but also its rarity in contemporary collections.