Product Details

This is an exceptional large cabinet specimen of hyalite opal (opal-AN) from San Luis Potosí, Mexico, weighing 1250 grams (2.75 lbs) and measuring 7.25 × 6 × 3 inches. The specimen is completely covered in glassy, water-clear botryoidal formations, giving it a striking “frozen water” appearance. Under shortwave UV (254 nm), the opal exhibits extremely bright neon-green fluorescence—so intense it overwhelms most cameras, a hallmark of the finest San Luis Potosí material. Specimens of this size, coverage, and fluorescence are highly sought after and rarely offered on the market. This is a true showpiece for any collection, especially when displayed under UV light. Locality: San Luis Potosí, Mexico Weight: 1250 g (2.75 lbs) Dimensions: 7.25 × 6 × 3 in Fluorescence: Extremely bright green under SW-UV Condition: Excellent coverage with strong aesthetic appeal Estimated Market Value: $800–$1,200 (dealer/retail), with potential for higher pricing in curated showrooms.