Crystals for calm

The crystals people reach for around calm are Amazonite, Amber and Amethyst, 52 stones in all. for when your chest is tight. 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.

• Amazonite6-6.5 Mohs · feldspar · heart, throatGreen microcline, coloured by trace lead and structural water, and named after a river it has never actually been found in. The Pikes Peak …
• 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…
• Amethyst7 Mohs · quartz · third-eye, crownQuartz stained violet by iron and buried radiation, quarried in geodes the size of coffins from Brazilian and Uruguayan basalt. It was a ca…
• Angelite3.5 Mohs · sulfate · throat, third-eye, crownAnhydrite, calcium sulfate with the water taken out, in a soft periwinkle from Peru, given a marketing name in the 1980s and now permanentl…
• Apache Tears5-6 Mohs · volcanic glass · root, heartObsidian nodules that survived when the surrounding glass hydrated into crumbly perlite, mineralogists call them marekanite. The American n…
• Aquamarine7.5-8 Mohs · silicate · throat, heartBlue beryl, the same species as emerald with iron instead of chromium, and the traditional talisman of sailors, the Romans considered it Ne…
• 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 …
• Aura Quartz7 Mohs · quartz · crown, third-eye, throatOrdinary quartz run through a vacuum chamber and fused with vaporised metal, a 1980s lapidary trick that produced the most photogenic objec…
• Bismuth2-2.5 Mohs · man-made · crown, third-eyeElemental bismuth, grown in a saucepan and cooled slowly enough that the edges outrun the faces and produce those stepped rainbow labyrinth…
• Blue Lace Agate6.5-7 Mohs · chalcedony · throatChalcedony banded in pale blue and white, essentially all of it from one region of Namibia, which is why the supply is finite and the price…
• Botswana Agate6.5-7 Mohs · chalcedony · crown, sacralGrey and dusty-pink banded agate from the Bobonong district, famous for band-per-millimetre fineness that makes cut slabs look like topogra…
• 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,…
• Celestite3-3.5 Mohs · sulfate · throat, third-eye, crownStrontium sulfate, the mineral that makes fireworks red, growing as pale blue crystal-lined cavities in Madagascan and Ohioan sedimentary r…
• Cherry Quartz5-6 Mohs · man-made · heart, sacralColoured glass, marbled with white and cut into points and spheres, sold with a fruit name and a quartz claim. There is no natural material…
• Chrysocolla2.5-7 Mohs · silicate · throat, heartA hydrated copper silicate with no fixed hardness, ranging from chalk to gem depending on how much silica got into it. The Greeks named it …
• 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…
• Crazy Lace Agate6.5-7 Mohs · chalcedony · solar-plexus, sacralChihuahuan agate that formed in a rock that kept breaking and re-healing, producing banding with no discipline whatsoever. Dealers call it …
• Dalmatian Stone6-7 Mohs · rock (aggregate) · root, sacralNot a jasper and not tourmaline-spotted: a peralkaline microgranite from Chihuahua whose black flecks are arfvedsonite, an amphibole. The e…
• Desert Rose2-3.5 Mohs · sulfate · root, crownGypsum crystallising out of evaporating groundwater in a desert basin, growing around and through the sand until it forms a rosette. Oklaho…
• Fluorite4 Mohs · halide · third-eye, throat, heartCalcium fluoride in cubes and octahedra, coloured every shade in the box by lattice defects and trace elements, and the mineral that gave f…
• 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…
• Howlite3.5 Mohs · silicate · crown, third-eyeA calcium borosilicate from Nova Scotia that would be an obscure collector's mineral if it were not the perfect blank canvas, porous, white…
• 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…
• Kunzite6.5-7 Mohs · silicate · heartPink spodumene, identified in 1902 and named for Tiffany's gemmologist George Frederick Kunz, who found it in the pegmatites of San Diego C…
• Larimar4.5-5 Mohs · silicate · throat, heartBlue pectolite from a single volcanic outcrop in Barahona Province, Dominican Republic, one mountainside, one country, no substitutes. It w…
• Lepidolite2.5-3 Mohs · silicate · heart, third-eye, crownA lithium-bearing mica in lavender flakes, mined chiefly as a lithium ore and sold as a calming stone on the strength of that chemistry. Th…
• Magnesite3.5-4.5 Mohs · carbonate · crown, heartMagnesium carbonate, mostly an industrial refractory mineral, and the second great blank canvas of the crystal trade. Where howlite has bla…
• Milky Quartz7 Mohs · quartz · crownThe plain white filler of a thousand mineral veins, quartz clouded to opacity by trapped water and gas. It is the most abundant gemmy rock …
• Moonstone6-6.5 Mohs · feldspar · sacral, third-eye, crownPotassium feldspar that unmixed into microscopically thin alternating layers as it cooled, scattering light into a floating blue-white glow…
• Morganite7.5-8 Mohs · silicate · heartPink beryl, named in 1911 for J.P. Morgan, who was buying minerals at a scale that got things named after him. Manganese does the colouring…
• 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…
• Ocean Jasper6.5-7 Mohs · chalcedony · heart, throatNot really a jasper: an orbicular rhyolite from the north-west Madagascan coast in which silica-rich fluids grew spherulites and then repla…
• Opalite5.5-6 Mohs · man-made · crown, third-eyeGlass. Not opal, not moonstone, not a mineral of any kind, an opalescent art glass produced in quantity and sold under a name engineered to…
• Petrified Wood6.5-7 Mohs · organic · rootWood in which every cell wall was templated and then replaced by silica, molecule by molecule, so the structure survives while none of the …
• Picture Jasper6.5-7 Mohs · chalcedony · root, third-eyeVolcanic ash and mud laid down in still water, compressed, silicified, and then sliced, so the desert scene you are looking at is an actual…
• Prasiolite7 Mohs · quartz · heartAmethyst that went into the furnace and came out green instead of orange, a quirk of which iron sites survive the heat. It is marketed as '…
• Prehnite6-6.5 Mohs · silicate · heart, solar-plexusThe first mineral ever named after a person, Colonel Hendrik von Prehn, who brought it back from the Cape in the 1780s. It grows as pale gr…
• Rainbow Moonstone6-6.5 Mohs · feldspar · third-eye, crown, sacralThe best-selling moonstone in the world is not moonstone: it is white labradorite from India and Madagascar, flashing blue by a different o…
• Rose Quartz7 Mohs · quartz · heartPink from vanishingly small fibres of a dumortierite-like mineral suspended in the quartz, the colour is a structural accident, not a dye. …
• Satin Spar2 Mohs · sulfate · crownThe white silky towers everyone owns and everyone calls selenite. It is fibrous gypsum, same mineral, different habit, mined mostly in Moro…
• Selenite2 Mohs · sulfate · crown, third-eyeTransparent gypsum, soft enough to mark with a fingernail and soluble enough to ruin in a rainstorm, the mineral kingdom's tissue paper. Me…
• Septarian3-4 Mohs · rock (aggregate) · root, solar-plexusA mud concretion that formed around decaying organic matter on a Cretaceous seafloor, dried, cracked from the inside out, and then had ever…
• Seraphinite2-2.5 Mohs · silicate · heart, crownA compact chlorite from the Korshunovskoye iron skarn in Irkutsk Oblast, marketed since the 1990s under a name taken from the seraphim beca…
• Serpentine2.5-6 Mohs · silicate · heart, rootThe rock that forms when seawater cooks peridotite deep in the crust, California's state rock, the world's asbestos problem, and the crysta…
• Snowflake Obsidian5-6 Mohs · volcanic glass · root, crownObsidian caught in the act of devitrifying, the white flowers are cristobalite crystals nucleating in glass that is slowly, over geological…
• Spirit Quartz7 Mohs · quartz · crown, third-eyeA quartz prism that grew a second, finer coat of crystals over every face, from a small handful of pipes near Boekenhoutshoek in Mpumalanga…
• 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…
• Synthetic Opal4.5-6.5 Mohs · man-made · crown, heartReal opal chemistry assembled by people, silica microspheres stacked into the same diffraction lattice nature builds, then consolidated, of…
• Turquoise5-6 Mohs · phosphate · throat, third-eyeA hydrated copper aluminium phosphate that has been mined in Sinai and Iran for over six thousand years and in the American Southwest for a…
• Unakite6-7 Mohs · rock (aggregate) · heart, third-eyeGranite that got hydrothermally cooked until its feldspar went salmon-pink and epidote grew through it in pistachio patches, named for the …
• Watermelon Tourmaline7-7.5 Mohs · silicate · heartA single elbaite crystal that changed its chemistry mid-growth, ending up pink inside and green outside, slice it and you get the fruit. Br…

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