Clouds move in Saturday night, possible showers overnight
Skies become cloudy tonight with scattered showers. Those raindrops linger into the first half of tomorrow. Tomorrow afternoon becomes brighter and warmer. The fireworks forecast looks great before, during and after the big show. Temperatures climb to middle and late summer levels by the end of this week.
‘Rock librarian’ explains clues for identifying U.P. mine’s mystery mineral
“Identifying physical properties can give clues about the chemical composition of a mineral,” Humphrey noted. -How the mineral breaks apart-Density/specific gravity (can get an idea by “hefting” to see if it’s heavy for its size)-Luster (is the shiny, dull, glassy?) mineral was found in the Adventure Mine’s third subterranean level, which had recently been pumped dry after being waterlogged for almost a century. While the mineral’s composition remains unknown, Humphrey speculated it may be azurite, as it is associated with copper ores and can occur as bright blue. However, she cautioned that color alone is not conclusive for identification.
mlive.com