670-61-16-63 cmd@cristalljoia.com In the heart of Barcelona and online
Shopping Cart
What determines the value of a mineral?
The value of a mineral isn't in its name. It's in how it formed, and in how unlikely it is that nature created exactly that piece.
Read more
Uruguayan amethyst: small points and deep violet. Brazilian: large and lighter. Why?
Why does natural amethyst from Uruguay have small points and such a deep violet, while natural amethyst from Brazil has large crystals and a lighter colour? We explain it all here.
Read more
Is obsidian a mineral? The answer might surprise you
Obsidian is one of nature's most fascinating stones… and it turns out it's technically not a mineral. Find out what it really is, why, and the curiosities that make it truly unique.
Read more
Red Jasper, Sardonyx, Picture, Leopard, Dalmatian... Why Are There So Many Types of Jasper?
Red jasper, sardonyx, picture, leopard, Dalmatian... are these different stones or variations of the same one? We break it down simply.
Read more
Quartz vs White Quartz vs Rock Crystal: What's the Difference?
Everything you need to know about quartz, white quartz and rock crystal: why they get confused so often and what really sets them apart.
Read more
Pink amethyst: a new stone with a lot to tell
Everything we know — and what is still debated — about pink amethyst: its colour, its origin and why it is so different from rose quartz.
Read more
Larimar: the Caribbean's secret stone — origin, properties and uses
Everything you need to know about larimar: where it comes from, how it is worked and what properties are attributed to it.
Read more
Moonstone, lunar glow captured in stone
Discover the magic of moonlight captured within moonstone
Read more
Fluorescent minerals under UV light
Discover the fascinating fluorescent minerals under UV light at Cristalljoia
Read more