This is a very rare opal, almost never seen in bead form. Hyalite opal, also known as "water-drop stone," is a colorless and transparent opal that exhibits intense fluorescence under ultraviolet light. It is usually unsuitable for cutting due to its delicate, water-droplet-like crystalline structure, but these appear to have been gathered and made into beads. It is unusual for this stone to be available as an accessory in the semi-precious stone industry. Formed by steam erupting near volcanic vents, it is sometimes called "glass opal" due to its glassy appearance. However, the reason this stone glows is because it contains uranium and reacts to black light. Although it is not enough to affect the human body, it does emit weak radiation. Please understand this before purchasing. As it is unlikely to be restocked in the future, please consider purchasing it. (Number of beads) 1 (Bead size) Approximately 11.5mm *These stones are made from processed small crystals, so there may be non-circular parts, scratches, and small chips. Please consider this before purchasing. (Shipping method) We will ship via Mercari's tracked shipping service. We will pack it with air cell mat and ship it quickly. If you have any questions, please leave a comment and we will answer, but we will reply late at night on weekdays (Monday-Friday) due to work. Thank you for your understanding. ・Natural stone ・Beads ・Power stone #MorinoIshiyaOpal ←By stone #MorinoIshiyaBeads ←By item #MorinoIshiyaWhite ←By color #MorinoIshiya ←All products