Skip to content

Calcite

Golden Elmwood twins, Hunan pink rhombs, Guangxi stalactites and Mexican blue freeforms, one calcium carbonate in many shapes.

Buy Calcite Specimens, from Elmwood Golden Twins to Chinese Rhombs and Mexican Blue Freeforms

Calcite is calcium carbonate, a mineral of Mohs three that crystallises in more distinct habits than almost anything else on a dealer shelf, and that grows the same chemistry into dogtooth points, flat pink rhombs, stalactites and water clear optical crystals. Astro Gallery of Gems buys calcite at the mine and at the shows in Tennessee, Hunan, Maharashtra and Mexico, weighs and measures each piece, then photographs it against a plain ground, so all 108 specimens on this page are catalogued as individual crystals rather than as a species.

Which Calcite Habit Are You Actually Looking At?

Habit, not colour, is the first thing an experienced buyer names on a calcite. The same carbonate builds four quite separate silhouettes, each of which reaches a different price and asks for a different position in a room. These four cover everything currently catalogued.

HabitHow it presents and what it costs to house
Scalenohedral, the dogtooth formSharp double terminated blades that meet in a point, seen on the golden Elmwood crystals and on Hubei clusters coated in iridescent chalcopyrite, and the form most vulnerable to a knocked tip.
Rhombohedral, including twinsBlocky lozenges whose faces meet at oblique angles, from the pale pink flattened rhombs of Hunan to penetration twinned golden crystals from Nasik that lock two individuals into one shape.
Stalactitic and botryoidalDripstone growths from Guilin in Guangxi, tan to orange, built from parallel crystal faces layered over a hollow core, which display well lying down rather than standing upright.
Polished freeform and geodeBlue Mexican and pink Pakistani mangano calcite worked to a mirror on a wheel, plus large Indian vugs lined with crystals, bought for a console or a mantel as much as for a cabinet.

A single habit can span the whole range of this collection. A 289 gram Elmwood crystal and a 22 pound twinned mass from a Pennsylvania quarry are both rhombohedral calcite, and the distance between them is size, transparency and the sharpness of the terminations rather than any difference in chemistry. Astro Gallery records the habit, the weight and the three dimensions on every listing, so those differences stay checkable instead of implied.

Where Was This Calcite Mined, and Why Does That Change the Colour?

Colour in calcite comes from trace metals entering the carbonate lattice, so the locality on the label predicts the colour before you ever see the photograph. Astro Gallery buys from four regions that each produce a recognisable calcite, and names the mine on the listing wherever the source is documented.

Elmwood Mine, Carthage, TennesseeThe Smith County zinc workings produce transparent deep golden calcite, double terminated and twinned on the c axis with clean re entrant faces, often perched on sphalerite. Elmwood is the reference standard for golden calcite worldwide.
Hunan, Guangxi and Hubei, ChinaChenzhou yields pale pink manganoan calcite coloured by manganese impurities, Guilin supplies tan stalactitic growths, and the Edong district near Daye produces scalenohedral clusters skinned with iridescent chalcopyrite.
Mexican blue and Chihuahua rhombsMexican deposits give the soft blue calcite cut into polished freeforms, while the Santa Eulalia district in Chihuahua produces colourless gem rhombs perched on limonite matrix alongside hemimorphite blades.
Nasik, Jalgaon and Mumbai, IndiaThe Deccan basalt quarries of Maharashtra open vugs where golden penetration twinned calcite grows beside green apophyllite, pink stilbite and druzy chalcedony, giving the most colourful associations here.

Crystallised Calcite Specimen or Polished Blue Freeform?

Two very different purchases share this page, and the split is not about budget. It is about whether you want the crystal as nature grew it or the stone as a lapidary finished it.

The crystallised specimenCollectors buy the untouched crystal for its terminations, its transparency and its named mine, and they store it in a cabinet where the light can reach a face. Damage matters intensely on this side, because a chipped scalenohedron cannot be replaced by another from the same pocket.
The polished freeformInterior and metaphysical buyers reach for the blue Mexican and pink mangano pieces, which arrive already smooth, survive handling and sit on a console or a desk. Blue calcite carries throat chakra associations and mangano calcite heart chakra associations in that trade vocabulary.

What Does a Calcite Specimen Cost Today?

Each row below is one physical calcite photographed exactly as it will arrive, priced live from the catalogue rather than from a printed sheet. When a piece sells it drops out of the table instead of remaining on the page as something nobody can buy.

PieceDetailPrice
Copper included Calcite From Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, Michigan See listing $ 12,000.00
Calcite with Chalcopyrite From Edong Mining District, Daye, Hubei, China See listing $ 6,000.00
Golden Calcite Crystals from York Stone Quarry, York County, Pennsylvania See listing $ 4,000.00
Calcite with Huelandite and Stilbite on Chalcedony Matrix from Jalgaon, Maharashtra, India See listing $ 7,500.00
Twinned Golden Calcite with Apophyllite & Stilbite From Nasik District, Maharashtra, India See listing $ 9,000.00
Golden Calcite Crystal from Elmwood Mine, Tennessee (289.5 grams) 289.5 grams $ 600.00
Each calcite here is one crystal, catalogued aloneThe images show the exact specimen, the weight and three dimensions are stated, and the price refreshes straight from the catalogue.
View all 108 pieces Request more photographs

What Should You Check on a Calcite Before Paying?

Calcite carries one structural weakness that decides most of its condition history: perfect cleavage in three directions, which means a knock releases a flat mirror bright plane instead of a rough chip. Four checks catch almost everything, and all of them read from photographs.

Cleavage planes and stepped edgesLook along each termination for a flat reflective face that cuts across the crystal shape. That plane is cleavage damage rather than a growth face, and Astro Gallery photographs it directly instead of turning the specimen away.
Fluorescence under ultravioletManganese activated calcite answers a shortwave lamp with a red to pink glow, and a few pieces keep shining briefly afterwards. Astro Gallery describes a calcite as fluorescent only after putting it under a lamp.
Reglued terminations on twinsPenetration twins from Nasik and double terminated Elmwood crystals snap at the join more readily than anywhere else on the crystal, so any repair on those points is stated in the description and shown close up.
Matrix seating and stabilityA crystal group standing on sphalerite, basalt or limonite must rest without rocking, because pressure on one contact point travels straight into the cleavage. Astro Gallery photographs the underside of every matrix piece.

How Do You Keep Calcite Away From Acid, Water and Sunlight?

Calcite is the softest common cabinet mineral and the most chemically reactive, so its care rule is short and absolute: keep it dry and keep it away from anything acidic. At Mohs three it scratches under a steel key and marks under a fingernail, and as a carbonate it fizzes and etches on contact with vinegar, citrus, descaler or ordinary bathroom spray, which permanently dulls a polished blue freeform and frosts a transparent crystal face. Dust the crystals with a dry soft brush, never a damp cloth, and lift a specimen by its matrix rather than by a termination. Keep pink mangano and blue Mexican pieces out of a south facing window, since strong daylight pales both over a season.

What Do the Words in a Calcite Description Actually Mean?

ScalenohedronThe pointed dogtooth habit built from twelve scalene triangular faces, which gives calcite its sharpest terminations and its most fragile tips.
RhombohedronThe blocky lozenge habit whose six faces meet at oblique angles, matching the same shape calcite produces when it cleaves along its three planes.
Penetration twinTwo calcite individuals grown through one another on a shared axis, producing a single crystal that reads as doubled from certain angles.
Re entrant faceThe notched inward step where two twinned halves meet, and the clearest visual proof that a crystal is twinned rather than simply large.
Double refractionThe optical property that splits a line viewed through clear calcite into two images, which is why transparent material is sold as optical calcite.
FluorescenceVisible light emitted while a specimen sits under an ultraviolet lamp, driven in calcite by trace manganese, and separate from any daylight colour.

Rated everywhere we trade

4.6★849 reviews 99.5%138,000 sold 4.7★404 reviews 4.5★126 ratings #128of 1,994 4.1★119 reviews

How Does a Cleavable Calcite Survive the Journey?

Payment runs through PayPal, Shop Pay, Google Pay and Apple Pay, or through Mastercard, Visa, Discover and Diners Club, while the invoice on file lists the habit, the locality and the weight of the crystal you bought. Ask our team beforehand for a measurement against a scale, a view of the reverse, or a photograph of a termination at close range, and they will send it instead of leaving you to guess from a thumbnail.

Astro Gallery of Gems has packed cleavable minerals since 1961, and calcite gets the most careful treatment on the bench. Terminations are isolated in cut foam so nothing presses on a tip, hollow stalactites and vugs are supported from inside, and every piece above a pound is double boxed. Each crate travels under tracking and carries insurance at its full declared value, with the customs documents written up before the lid goes on, while a heavy geode of twelve pounds or more moves by freight against a quote you approve first. The written invoice records what you bought, the returns policy defines what happens if a crystal reaches you damaged, and about us carries the guarantee behind both.

See the terminations before you decideAsk for close photographs of every point, the matrix and the underside, and our team will get them to you inside the working day.
Browse the calcite Email the gallery

Which Calcite Questions Come Up Before Checkout?

How much does a calcite specimen cost?
Price follows transparency, crystal size, sharpness of the terminations and the locality, rather than weight alone. Small polished Mexican blue freeforms and single Chinese rhombs open the range, large twinned Elmwood crystals and Indian apophyllite geodes sit at the top, and the live table above shows what is available right now.
Does calcite glow under ultraviolet light?
Many calcites do, and the effect comes from trace manganese rather than from the colour you see in daylight. A shortwave lamp brings up red to pink on manganese rich material, some pieces continue to glow for a second afterwards, and we only call a specimen fluorescent once we have tested it under a lamp.
Is blue calcite from Mexico natural or dyed?
The blue is natural. Mexican blue calcite is cut and polished from solid material with no fill and no dye, and the colour runs right through the piece, which you can confirm at any edge or chip. Polishing changes the surface, never the colour.
Why does calcite chip so easily?
Calcite has perfect cleavage in three directions and sits at Mohs three, so a knock releases a flat mirror bright plane rather than a rough chip. That is also why we isolate terminations in cut foam and photograph every existing cleavage surface before a piece is listed.
Will the calcite I receive match the images?
Yes. Every crystallised calcite and polished freeform is photographed individually, because no two pockets produce the same terminations or the same banding, so the specimen in the images is the specimen packed for you.
How do I clean a calcite specimen?
Dust it dry with a soft brush and use nothing else. Water leaves marks on porous matrix, and any acid, including vinegar, citrus juice and household descaler, etches calcite on contact and permanently dulls a polished surface.
Which calcite size fits a bookshelf?
Pieces between one and five pounds sit comfortably beside books, which covers most Chinese rhombs, Elmwood crystals on matrix and small polished freeforms. Anything above twelve pounds becomes a console or floor piece, and every listing states weight plus three dimensions in inches.
Do you ship calcite overseas, and what happens if it arrives damaged?
We deliver worldwide under tracking, with cover for the full declared value and customs documents written up before the crate is sealed. If a parcel is damaged in transit, photograph the carton and the specimen on arrival and contact us, and we handle the insurance claim under the terms on our returns page.

Which Shelves Sit Closest to Calcite?

Calcite touches almost every other shelf in the catalogue, because it grows alongside more species than any other carbonate. Buyers following the associations move into fluorite and apophyllite, while buyers following the polished blue and pink material move towards decor.

Species found with calcite
Fluorite Apophyllite Malachite Azurite Barite
Calcite producing regions
Indian minerals Asian minerals North American minerals African minerals
By grade and rarity
Fine minerals The Vault Museum quality minerals Geodes
Polished and for the room
Polished stones Home decor Spheres Palm stones Gifts
Terms and delivery
Delivery and returns policy About the gallery All mineral specimens