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Weloganite, Francon Quarry Montreal

Weloganite, Francon Quarry, Montreal

Weloganite is a rare carbonate mineral with formula: Na2(Sr,Ca)3Zr(CO3)6·3H2O. It was discovered in 1967 By Ann P Sabina and named for Canadian geologist Sir William Edmond Logan (1798-1875). It was first discovered in Francon Quarry, Montreal, Canada where it occurs in an igneous carbonatite sill. It also occurs in the Poudrette quarry at Mont Saint-Hilaire as core in some Donnayite crystals. Associated minerals include Strontianite, Dawsonite and calcite. It has also been reported from the Pilansberg Complex of the western Bushveld Igneous Complex in South Africa, not confirmed. It is usually white, lemon yellow, or amber in color, and can be translucent. It crystallizes in the triclinic system and shows pseudo-hexagonal crystal forms due to twinning.

Size of this specimen is. Two large crystals are well terminated and mm.

Price= $125.00

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