	Cassandra	Cassegrain Lunar Crater	Laurent Cassegrain	Cassegrain Reflector Telescope	Hopalong Cassidy
William A. Cassidy	Cassidyite	Cassidy Glacier	Cassidy Meteorite	Cassie's Law	$Orthoclase Variety Cassinite, also known as Lansfordite is a hydrated magnesium carbonate mineral with composition: MgCO3·5H2O. Landsfordite was discovered in 1888 in a coal mine in Lansford, Pennsylvania. It crystallizes in the monoclinic system (space group P21/c) and typically occurs as colorless to white prismatic crystals and stalactitic masses. It is a soft mineral, Mohs hardness of 2.5, with a low specific gravity of 1.7. It is transparent to translucent with refractive indices of 1.46 to 1.51. The mineral will effloresce at room temperature, producing nesquehonite. Five birds from North America are named in the honor of John Cassis: the Cassin's auklet, Cassin's kingbird, Cassin's vireo, Cassin's sparrow, and Cassin's finch. The periodic cicada Magicicada cassini and the mineral Orthoclase Variety Cassinite are also named for him.$ Orthoclase Variety Cassinite
Cassin's Auklet	Cassin's Kingbird	Cassin's Vireo	John Cassin	Cassin's Sparrow	Cassin's Finch
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