Mineralo

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BariciteA rare member of the Vivianite family of phosphate minerals (see bit.ly/2nqydbX for m

Senegalite with turquoiseNamed in 1976 after its country of discovery, this rare hydrated aluminium

Hureaulite A manganese phosphate mineral that forms from altered minerals in granitic pegmatites, th

Azurite sea horseWe often return to the copper carbonate minerals such as azurite and malachite, sin

Pentlandite with Chalcopyrite (± Violarite, Pyrrhotite, and Magnetite)Locality: Sudbury Distr

The Time StoneThis gem quality specimen was photographed in the Natural History Museum of London. Em

Zoned RubyRuby is a gemstone version of the mineral Corundum, a simple aluminum oxide mineral. Corun

Chrome DiopsideSharing the grassy green of emerald, Tsavorite garnet (on.fb.me/1ygBzM5) and c

Crikey, it’s crocoite!This striking red-orange mineral is known as crocoite. It is a lead

emeraldcityminerals:Green chromian diopside (CaMgSi2O6). From Keretti Mine, North Karelia, Finl

Topaz, with attendant tourmalineTopaz is a hydrated aluminium fluorosilicate, and a biggie in the ge

Dioptase.Copper sulphides when deposited are a grey or golden colour, but get some groundwater passi

RealgarWe covered this lovely arsenic sulphide mineral some time ago (tinyurl.com/klmnq35), b

A tale of two fluidsOnce upon a time there was a granite that rose from the bowels of the Earth towa

Elbaite on cleavelanditeElbaite is a variety of tourmaline named after the island where Napoleon 1st

Mica bookMost mineralogy class collections around the world have a specimen like this: a book of mic

entropicbrain:Sweet piece of mica I found in the waterway.

Massive Sulfide DepositsSulfide minerals host many of our most important ores, including copper, nic

fossilera:A stunning fossil freshwater crab preserved in travertine. Travertine is a type of limesto

Table saltThe white or grey stuff you add to your food is a purified form of the mineral halite, pro

Emerald unguentariumI couldn’t resist this word, redolent of the flavour of a bygone age,

Emerald unguentariumI couldn’t resist this word, redolent of the flavour of a bygone age,

Morganite with KunziteSitting on its 27x20cm matrix of Afghan Quartz and Clevelandite feldspar, we h

StilbiteZeolites are a common group of minerals, somewhat neglected by collectors, though stunning e

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