Crystals for money

The crystals people reach for around money are Amber, Ametrine and Ammonite, 20 stones in all. the ones that were always about money. Every entry below states what the mineral actually is, how to tell a real one from a dyed or heated lookalike, and what each of the twelve signs is told about it.

• Amber2-2.5 Mohs · organic · solar-plexus, sacralTree resin from Eocene forests, polymerised over 30 to 90 million years, and the only gem material that regularly contains a dead animal. T…
• Ametrine7 Mohs · quartz · solar-plexus, third-eye, crownA single quartz crystal that grew through a temperature gradient, ending up amethyst at one end and citrine at the other, with a boundary y…
• Ammonite3.5-4.5 Mohs · organic · root, crownA cephalopod that built its shell in a logarithmic spiral, lived in the last chamber and used the rest for buoyancy, then went extinct with…
• Aragonite3.5-4 Mohs · carbonate · root, sacral, solar-plexusCalcium carbonate crystallised in the orthorhombic system instead of the trigonal one, which is the only difference between it and calcite …
• Calcite (Coloured Varieties)3 Mohs · carbonate · sacral, solar-plexus, heartThe most abundant carbonate on earth in its decorative dress, orange and honey from Mexico, mint green from Pakistan, blue from Madagascar,…
• Carnelian6.5-7 Mohs · chalcedony · sacral, rootIron-stained chalcedony the colour of a low fire, and one of the oldest worked gemstones on record, Egyptian, Roman and Islamic carvers all…
• Chrysoprase6-7 Mohs · chalcedony · heartThe only chalcedony coloured green by nickel rather than by iron or chromium, which is why the tone is unmistakably apple rather than fores…
• Citrine (Heat-Treated Amethyst)7 Mohs · quartz · solar-plexus, sacralAmethyst that has been through a furnace and come out the colour of cheap brandy. Nothing dishonest has happened to the mineral, it is stil…
• Citrine (Natural)7 Mohs · quartz · solar-plexus, sacralActual citrine is a quiet, weak-tea yellow and it is genuinely uncommon, most of what the trade calls citrine has been in an oven. The natu…
• Emerald7.5-8 Mohs · silicate · heartBeryl coloured by chromium, and one of the four traditional precious stones, mined at Cleopatra's Egyptian workings, then in vast quantity …
• Goldstone5-6 Mohs · man-made · sacral, solar-plexusSeventeenth-century Venetian glass in which metallic copper is crystallised out of the melt under controlled oxygen starvation, a genuinely…
• Green Aventurine6.5-7 Mohs · quartz · heartA quartzite glittering with chromium mica, mined chiefly in southern India and sold in more starter kits than almost anything else. The nam…
• Jadeite Jade6-7 Mohs · silicate · heartThe other jade, a sodium aluminium pyroxene, rarer than nephrite and the material of the Qing imperial court and Mesoamerican Olmec and May…
• Moss Agate6.5-7 Mohs · chalcedony · heart, rootChalcedony that trapped mineral filaments as it formed, producing something that looks convincingly like vegetation and is entirely inorgan…
• Nephrite Jade6-6.5 Mohs · silicate · heartThe jade of ancient China, Māori Aotearoa and neolithic Europe, an amphibole so tough that stone-age cultures made axes of it before anyone…
• Peridot6.5-7 Mohs · silicate · heart, solar-plexusOlivine from the earth's mantle, brought up in basalt, and occasionally arriving from space inside pallasite meteorites. The Egyptians mine…
• Pyrite6-6.5 Mohs · sulfide · solar-plexus, rootIron sulfide that grows in perfect cubes with striated faces, and has been fooling prospectors so reliably that its nickname is older than …
• Rutilated Quartz7 Mohs · quartz · solar-plexus, crownQuartz that trapped needles of titanium dioxide as it grew, producing what looks like gold wire frozen mid-flight. Renaissance Europeans ca…
• Strawberry Quartz (Glass)5-6 Mohs · man-made · heartTwo entirely different things share this name: a scarce natural quartz with red iron-oxide platelets, and an enormous volume of manufacture…
• Sunstone6-6.5 Mohs · feldspar · sacral, solar-plexusFeldspar that trapped sheets of copper or hematite platelets while crystallising, so it flashes metallic orange when the light finds the ri…

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