Specific gravity: 4.45
Streak: Pale nickel green
Solubility: Luddenite is not easily soluble in acids. Dissolution even in heated 50% HNO3 is slow. It readily fuses to a runny lemon yellow slag in the closed tube (Mindat).
Luddenite occurs in thoroughly oxidised lead-copper sulphide ores, associated with
chrysocolla and wickenburgite
At the type locality, an unnamed prospect near Artillery Peak, Mohave county, Arizona, USA, luddenite occurs with galena, chalcopyrite, fluorite, alamosite, melanotekite and hyalotekite (Dana, AM 68.643).
Common impurities: Ti
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