Schorl, Phlogopite, Calcite, Quartz

Specimen ID: 1XN-VUF

Mineral(s)
Schorl : NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Phlogopite : KMg3(AlSi3O10)(OH)2
Calcite : CaCO3
Quartz : SiO2
Locality
Mindat locality:
Dimensions
8cm x 6cm x 4cm
Collections
Collected by:
Events

Photo added to mindat.org

Short prismatic schorl crystals with good lustre and up to 1 cm. sit on a bed of milky quartzes , which in turn sit on a phlogopite crystal section that has pink calcite as its matrix. Only the tip of one schorl crystal was visible when I collected this specimen. When I etched it with vinegar over the period over several days, the schorl cluster and the quartz appeared. Personally collected with John Biczok and Doug Scott, May 2018
John R. Montgomery - 19th June 2018

Photo added to mindat.org

Here one can see the trigonal form of the top schorl crystal which was hollowed out when the etching dissolved the calcite that made up its core. A remnant of the white calcite can be seen in the centre. Personally collected with John Biczok and Doug Scott, May 2018
John R. Montgomery - 19th June 2018

Photo added to mindat.org

Short prismatic schorl crystals with good lustre and up to 1 cm. sit on a bed of milky quartzes , which in turn sit on a phlogopite crystal section that has pink calcite as its matrix. Only the tip of one schorl crystal was visible when I collected this specimen. When I etched it with vinegar over the period over several days, the schorl cluster and the quartz appeared. Personally collected with John Biczok and Doug Scott, May 2018
John R. Montgomery - 19th June 2018

Photo added to mindat.org

Short prismatic schorl crystals with good lustre and up to 1 cm. sit on a bed of milky quartzes , which in turn sit on a phlogopite crystal section that has pink calcite as its matrix. Only the tip of one schorl crystal was visible when I collected this specimen. When I etched it with vinegar over the period over several days, the schorl cluster and the quartz appeared. Personally collected with John Biczok and Doug Scott, May 2018
John R. Montgomery - 19th June 2018
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