Osumilite-(Mg). Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany Photo © Stephan Wolfsried

Osumilite-(Mg). Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany Photo © Stephan Wolfsried

Fluorite Locality: Rosiclare level, Denton Mine, Goose Creek Mine Group, Harris Creek Sub-District, Hardin County, Illinois,

Fluorite Locality: Rosiclare level, Denton Mine, Goose Creek Mine Group, Harris Creek Sub-District, Hardin County, Illinois,

Rutile Quartz from Madagascar

Rutile Quartz from Madagascar

Alternatives: June - Alexandrite, October - Pink Tourmaline, November - Citrine, December - Blue Topaz.

Alternatives: June - Alexandrite, October - Pink Tourmaline, November - Citrine, December - Blue Topaz.

Fluorite

Fluorite

Beautiful Tanzanite - I don’t think I’ve ever seen as rich a blue in a zoisite as this 10 cm specimen on matrix from the Merelani hills of Tanzania. While it has almost certainly been heated to bring out the colour (natural blues only happen when heat has been an immediate part of their geological adventure through deep time), the depth of saturation (pink for example is a light red) and perfection of tone (neither too light or dark) make this a gem to be admired.

Beautiful Tanzanite - I don’t think I’ve ever seen as rich a blue in a zoisite as this 10 cm specimen on matrix from the Merelani hills of Tanzania. While it has almost certainly been heated to bring out the colour (natural blues only happen when heat has been an immediate part of their geological adventure through deep time), the depth of saturation (pink for example is a light red) and perfection of tone (neither too light or dark) make this a gem to be admired.

Tourmaline

Tourmaline

Fluorite crystal formation from Hunan Province, China

Fluorite crystal formation from Hunan Province, China

Beryl var. aquamarine from Haramosh Mountains, Gilgit District, Northern Areas…

Beryl var. aquamarine from Haramosh Mountains, Gilgit District, Northern Areas…

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