arockmaniac:Black/gray/brown scheelite crystal from the Tae Hwa Mine, North Chungcheong Province, So
arockmaniac:Black/gray/brown scheelite crystal from the Tae Hwa Mine, North Chungcheong Province, South Korea. Scheelite is an ore of tungsten. Shown exhibiting the classic blue fluorescence under short wave ultraviolet light, under white light, and showing the red fluorescence that is sometimes seen under mid-wave ultraviolet light. The nearly equilateral triangle edges measure approximately 1 ¾ inches or 4.4 cm. -- source link
#scheelite#mineral#crystal#south korea#fluorescent#fluorescent mineral#mid-wave uv#fluorescence#minerals#fossils#geology#mineralogy#nature#science#natural beauty