Lazulite with Siderite | blue crystal, rare mineral specimen from CanadaLazulite with siderite from the Yukon is a visually compelling association that pairs the deep, velvety blue of lazulite with the warm, earthy tones of siderite. The lazulite typically forms as lustrous, sometimes wedge shaped crystals or compact masses, whose rich indigo coloration contrasts beautifully against the tan to reddish brown siderite. This specimen does have a loose crystal that moves a bit when touched. Ex. Garry Kolodinsky Collection