“Reference: MR91AE5 Aggregate of strongly elongated Hydroboracite crystals that are very sharp, colorless, completely clear and have an exceptional luster. They are on matrix, with transparent Gypsum crystals. Of the best quality for the species. Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen  Germany (2009) Specimen size: 11.5 × 9.7 × 6.9 cm = 4.53” × 3.82” × 2.72” Main crystal size: 1.5 × 0.3 cm = 0.59” × 0.12” ”