Hackmanite | Var. Sodalite Gemstone Rough Rose Red Fluorescent Under Sw Uv Natural 71mm 950Ct Collectible Crystal Mineral Décor Raw Specimen

The photos under SW UV light i took with using powerful 6w 254nm lamp with uv filter! I took the pictures of this stone in a professional photo studio to show the natural beauty of this piece to the fullest extent! I will send you exactly the stone you can see in the picture as it is absolutely unique in its kind! Cluster Size: 71mm x 49mm x 32 mm or 2 13/16 x 1 15/16 x 1 1/4 Inches; Weight 950ct or 190g or 6.7oz; Some photos taken wet. Hackmanite were found in Afghanistan. Hackmanite is an exceptionally rare sulfur-rich variety of sodalite which exhibits tenebrescence (the ability of minerals to change color when exposed to sunlight). It was first discovered in Greenland in 1896 by L. C. Boergstroem, & was later named after Victor Axel Hackman (1866-1941), a Finnish geologist, but it can also be found in a few other locations, including Afghanistan, Myanmar (Burma) & Quebec, Canada. Hackmanite appears pale to deep violet when first mined, but once exposed to sunlight, the color quickly fades to grayish or greenish-white. When placed back into a dark place or when exposed to short wave ultraviolet light, the violet color slowly returns. The change in color can be seen within seconds of being exposed to sunlight, but the return of the original color can sometimes take up to a week. The tenebrescence effect can be repeated indefinitely, but is detroyed by heating. Striking purple hackmanite originating from the lazurite mines of Sar-e Sang, Koksha Valley of Badakshan Province in Afghanistan are considered the most desirable of hackmanite stones, which are highly sought after by gem & mineral collectors. Hackmanite | Var. Sodalite Gemstone Rough Rose Red Fluorescent Under Sw Uv Natural 71mm 950Ct Collectible Crystal Mineral Décor Raw Specimen