1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.2 Durability
Not Available
Not Available
1.5 Specific Gravity
1.15 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
Not Available
1.16 Cleavage
Distinct on {001} and {110}, indistinct on {100}
{100} and {010} perfect
1.17 Mohs Hardness
1.18 Chemical Composition
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
LiNa(Zr,Ti,Hf)Si 6O 15Ulrich Henn and Claudio C.