Jewelry in Cristalljoia Minerals in the center of Barcelona Raw minerals in Cristalljoia Minerals in the center of Barcelona
Master Crystals in Cristalljoia Minerals in the center of Barcelona Polished minerals in Cristalljoia Minerals in the center of Barcelona
Amethyst in Cristalljoia Minerals in the center of Barcelona Quartz in Cristalljoia Minerals in the center of Barcelona
Carvings in Cristalljoia Minerals in the center of Barcelona Tumbled stone in Cristalljoia Minerals in the center of Barcelona
Selenite in Cristalljoia Minerals in the center of Barcelona Rose Quartz in Cristalljoia Minerals in the center of Barcelona
Tourmaline in Cristalljoia Minerals in the center of Barcelona Cabochons in Cristalljoia Minerals in the center of Barcelona
Our minerals in the shop A-Z listing
Mineral hardness game at Cristalljoia

-Mineral curiosities, access to the BLOG-

Not all minerals are gems, and not all gems are minerals

In this post, we explain the difference between a gem and a mineral

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Mysteries of moonstone's blue sheen

It's not magic, it's physics. That glow that seems to "float" in moonstone is called adularescence.

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What are aqua aura type minerals

Aqua aura quartz takes centuries to form... and only minutes to change colour. We tell you what's behind its shimmering reflections.

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The stone that guided the Vikings across the sea

No compass, no GPS, no direct view of the sun. Just a transparent crystal that revealed its position.

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Obsidian in pre-Columbian culture

Obsidian isn't a mineral, but a volcanic glass that Mesoamerican cultures turned into a tool, weapon, ritual mirror and symbol of status.

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Moon Minerals

Discover Moon minerals: from Apollo 11 lunar basalt to meteorites that fell on Earth.

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Cristalljoia - Barcelona

RockShop - CrystalShop in the heart of Barcelona


Minerals from all over the world for all over the world. More than 40 years in the purchase and sale of minerals, retail and wholesale.

From the center of Barcelona shipments to Spain and the rest of the world.

In the center of Barcelona, between Plaza Sant Jaime and Vía Layetana. Yellow Metro L4 (Jaume I est.).

In our physical store in the center of Barcelona we have much more variety than what is added on the web.

You can contact us without obligation at our email cmd@cristalljoia.com or whatsapp +34-670-61-16-63.

At Cristalljoia Barcelona we have a wide variety of minerals in a multitude of forms.

  • Raw minerals and rocks and 4x4 boxes for collection
  • Minerals in jewelry: bracelets, necklaces, pendants, earrings, rings...
  • Minerals for esotericism
  • Minerals for decoration

Do not hesitate to contact us if you have any questions or want us to show you the minerals that we have.

3D virtual tour of our store in the heart of Barcelona

virtual tour 3d Cristalljoia

Natural black tourmaline (unpolished)

One of the most surprising properties of black tourmaline is its pyroelectricity, which means it generates electricity when heated.

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Make a sliding knot for a mineral pendant

In this video, we explain how to make a pendant with a sliding knot so you can wear your minerals.

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Make a bracelet with elastic thread and mineral beads

In this video, Jessica explains to us how to make a bracelet with elastic thread and mineral beads.

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Questions (3)

Question form

Have you some question about our shop?

Your question can be answered by other users or the store administrator

Does raw amethyst lose its color if I leave it in sunlight?

0 votes

Yes, prolonged sun exposure can fade amethyst over time. Amethyst gets its purple color from iron impurities plus natural irradiation within the crystal structure, and UV light gradually breaks down that color.

Reply by Jèssica & Marc on 08/01/2026 Seller response
0 votes

does moonstone actually glow, or is that just a myth?

0 votes

No, moonstone doesn't glow or emit light on its own. What it does is reflect light in a special way: thanks to its internal layered structure (adularescence), it produces a bluish or whitish sheen that seems to float beneath the surface as you move the stone.

Reply by Jèssica & Marc on 07/25/2026 Seller response
0 votes

Is there any typical mineral found in Antarctica?

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There isn't one single "typical" Antarctic mineral, but coal occurs mainly in the Transantarctic Mountains, and iron, copper, and nickel ores are found in the Prince Charles Mountains. The Antarctic Peninsula extends the South American Andes, where molybdenum, gold, and silver occur.

Reply by Jèssica & Marc on 07/16/2026 Seller response
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