Blue crystals
You know the colour you want. The hard part is knowing which stone actually owns it.
Blue crystals are not one stone. 53 different minerals show up blue here, Amazonite, Amber and Angelite among them. Colour is the easiest thing to fake, so it is the worst way to name a stone. Every entry below gives you the test that settles it.
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Amazonite6-6.5 Mohs · feldspar · heart, throatAmazonite grew in cooling granite, in the last pockets of melt to harden. The green comes from a trace of lead locked in it. Nobody dyed…
Amber2-2.5 Mohs · organic · solar-plexus, sacralPick it up. Four seconds in your palm and it is warm. Glass and plastic never manage that. It is not a stone. It is tree resin that ran…
Angelite3.5 Mohs · sulphate · throat, third-eye, crownAngelite is a salt left behind where an ancient sea dried up. Burial and heat drove the water out of it. It wants that water back. Leave…
Aquamarine7.5-8 Mohs · silicate · throat, heartNearly every blue aquamarine in a shop window has been in an oven, at around 400 degrees, to burn the green out. It is permanent. No…
Aragonite3.5-4 Mohs · carbonate · root, sacral, solar-plexusAragonite builds itself out of mineral water in caves, in rust orange spikes that all shoot from one centre. It is on borrowed time…
Aura Quartz7 Mohs · quartz · crown, third-eye, throatThe quartz is real. It grew in rock like any other piece. Then a person put it in a vacuum chamber and bonded a film of vaporised metal…
Azurite3.5-4 Mohs · carbonate · third-eye, throatAzurite forms at the top of a copper deposit, where water and air have been rotting the ore for a very long time. It is the most…
Bismuth2-2.5 Mohs · man-made · crown, third-eyeA person made this one. Bismuth metal gets melted at around 271 degrees, cooled slowly so it grows in stepped squares, then the liquid…
Black Kyanite4.5-7 Mohs · silicate · root, throatAfter certain people leave, you go around opening windows. Black kyanite gets sold for exactly that feeling. It grows in splayed blades…
Black Tourmaline7-7.5 Mohs · silicate · rootIt sits by the door, or you meant to put it there. Black, heavy, fine ridges running the length of it. Squeeze it or warm it and it…
Blue Apatite5 Mohs · phosphate · throat, third-eyeBlue apatite is the mineral your teeth are made of. Your bones too. One version grows in cooling rock, the other grows in you. The name…- Blue Aventurine6.5 to 7 Mohs · quartzite · throat, third-eyeBlue aventurine is a rock, not a crystal. That is the right place to start, because almost everything written about it starts somewhere…
Blue Goldstone5-6 Mohs · man-made · third-eye, crownItalian glassmakers built this on purpose. Cobalt glass, melted with copper, cooled slow in a sealed pot so the copper had time to grow…
Blue Kyanite4.5-7 Mohs · silicate · throat, third-eyeKyanite needs burial to exist. Clay rich rock gets pushed down and squeezed until the aluminium in it grows into blue blades. It came…
Blue Lace Agate6.5-7 Mohs · chalcedony · throatThe message is typed. You have read it four times and it is still sitting there. Blue lace agate built up in a lava cavity the same way…
Calcite (Coloured Varieties)3 Mohs · carbonate · sacral, solar-plexus, heartCalcite is lime that water carried and put back down in a hole in the rock. It is soft. A copper coin marks it. Drop vinegar on it and…
Celestite3-3.5 Mohs · sulphate · throat, third-eye, crownCelestite is losing its colour while you look at it. A sunny sill bleaches the blue out and it never comes back. It grew from strontium…- Chalcedony6 to 7 Mohs · quartz · throatChalcedony is quartz that never grew up into crystals. Instead of one clear six sided prism, it is billions of quartz fibres, each…
Chrysocolla2.5-7 Mohs · silicate · throat, heartRain got into a copper deposit and worked on it for ages. It broke the ore apart and left this blue-green crust in the cracks. It is the…- Diamond10 Mohs · native element · crownA diamond is carbon that got buried. Around a hundred and fifty kilometres down, hot enough to melt most rock and squeezed harder than…
Emerald7.5-8 Mohs · silicate · heartNearly every emerald you will ever see has oil pressed into its cracks. Cedarwood oil usually, worked into the fissures until they stop…
Fire Agate6.5-7 Mohs · chalcedony · root, sacralTilt it under a lamp. Red and gold slide across the domes, then vanish when you hold still. That fire is not pigment. It is films of…
Fluorite4 Mohs · halide · third-eye, throat, heartFluorite survives almost nothing. A steel knife cuts it. One knock splits it clean along a flat plane, and long sun pulls the purple…
Galena2.5-2.75 Mohs · sulphide · rootIt is lead. The same lead that ran through Roman pipes and the same lead they took back out of petrol. Galena is soft, so it sheds fine…
Green Aventurine6.5-7 Mohs · quartz · heartIt began as plain sand on a seabed. Buried, pressed and cooked, the grains welded into one hard rock, and flecks of green mica got…
Howlite3.5 Mohs · silicate · crown, third-eyeSomeone dyed it blue and sold it as turquoise. That is not gossip. It is the trade's default move. Howlite formed in old salt flats…
Iolite7-7.5 Mohs · silicate · third-eye, throatOld seabed mud got buried under a mountain and cooked until it came out as a different mineral. Turn it under one lamp. Violet blue from…
Jadeite Jade6-7 Mohs · silicate · heartIn China, jade has stood for virtue for thousands of years. Not luck. Virtue. Mesoamerican carvers valued it above gold. Most fine…
Labradorite6-6.5 Mohs · feldspar · third-eye, throat, crownGrey and dull, like something off a driveway. Then you tilt it under a lamp and a sheet of blue switches on inside it. That flash is…
Lapis Lazuli5-6 Mohs · rock (aggregate) · third-eye, throatLimestone got cooked where hot magma pushed into it, and parts of it came out deep blue. One valley in Afghanistan has been mined for it…
Larimar4.5-5 Mohs · silicate · throat, heartSunlight takes the blue out of it, slowly and for good. Salt and long soaking dull it too. It filled gas bubbles in volcanic rock in one…
Magnesite3.5-4.5 Mohs · carbonate · crown, heartSomebody dyed this. Most of the cheap turquoise in a mall case is plain white magnesite that was soaked in blue until it took. Undyed it…- Moissanite9.25 to 9.5 Mohs · carbide · crownIn 1893 a French chemist was sorting through fragments of an iron meteorite that had punched a crater into Arizona, and he found tiny…
Moldavite5.5-7 Mohs · volcanic glass · heart, third-eye, crownAbout fifteen million years ago an asteroid hit what is now Bavaria. The ground melted and was thrown far enough to cool into glass…
Moonstone6-6.5 Mohs · feldspar · sacral, third-eye, crownTilt it under a lamp and a blue-white light slides over the surface. Stop tilting and it is gone. Moonstone is feldspar that separated…
Nuummite5.5-6 Mohs · rock (aggregate) · root, third-eyeIt looks like a plain black pebble until you turn it. Then gold and bronze streaks flash across it in hard straight lines and disappear…
Ocean Jasper6.5-7 Mohs · chalcedony · heart, throatIt is not a jasper. Silica soaked into old Madagascan lava and replaced it, keeping the little balls of crystal that grew while the lava…- Opal5.5 to 6 Mohs · silica · crown, heartOpal is water that got into rock and never came back out. Silica dissolved in groundwater works its way down through cracks in dry…
Opalite5.5-6 Mohs · man-made · crown, third-eyeSomebody made this in a furnace. Molten glass with a little tin and titanium stirred in to scatter the light blue, then poured and…
Picture Jasper6.5-7 Mohs · chalcedony · root, third-eyeThose are not hills. They are layers of volcanic ash and fine mud that settled in still water, one on top of the next. Silica soaked…
Pietersite6.5-7 Mohs · quartz · third-eye, solar-plexusThis was tiger's eye first. Fine blue fibres in rock, slowly replaced by quartz, all lying parallel. Then the ground moved and tore it…
Rainbow Moonstone6-6.5 Mohs · feldspar · third-eye, crown, sacralThis is white labradorite, a feldspar. It is not moonstone at all. Moonstone is a different feldspar. Somebody in the trade renamed it…
Rainbow Obsidian5-6 Mohs · volcanic glass · root, third-eyeIt is glass. The lava cooled too fast for crystals to form, so nothing inside got to finish growing. Almost nothing. Tiny rods of…- Sapphire9 Mohs · corundum · throat, third-eyeSapphire and ruby are the same mineral. Both are corundum, aluminium oxide, and what separates them is a trace of something that should…
Sodalite5.5-6 Mohs · silicate · throat, third-eyeSodalite formed in magma that ran out of silica. Where quartz would normally grow, this blue grew instead. Then it got sold as lapis…
Spectrolite6-6.5 Mohs · feldspar · third-eye, crownSpectrolite is labradorite. A Finnish quarry found the darkest material anyone had seen. They gave it a name of its own. The name is the…- Strawberry Quartz (Glass)5-6 Mohs · man-made · heartThis is glass. It was melted in a factory, mostly in China, with copper stirred through it. The red threads are real metal flakes. They…
- Synthetic Opal4.5-6.5 Mohs · man-made · crown, heartSomebody built this on purpose. Spheres finer than dust were settled into stacked layers and pressed solid. It is real opal, grown in a…
Tanzanite6-7 Mohs · silicate · third-eye, crown, throatTanzanite came out of one small patch of hills in northern Tanzania in 1967. There is nowhere else on earth. It does not come out blue…
Tiger's Eye6.5-7 Mohs · quartz · solar-plexus, rootThis used to be asbestos. Blue crocidolite fibres grew in the rock first, and quartz replaced them one by one. The silk you can see is…- Topaz8 Mohs · nesosilicate · solar-plexus, throatTopaz grows in the last hot breath of a cooling granite, in the cavities and gas pockets where fluorine-rich vapour has nowhere left to…
Turquoise5-6 Mohs · phosphate · throat, third-eyeTurquoise is central to Navajo, Zuni and Puebloan life. It is worn, inherited and made into work by living artists right now. The stone…- Zircon6 to 7.5 Mohs · nesosilicate · root, throat, third-eyeStart with the thing the shop counter will not say, because it is the whole reason this stone is treated as cheap. Zircon is not cubic…
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