Moldavite Characteristics: origin, properties and how to recognize it
A green glass born from a meteorite impact over 15 million years ago. Discover what makes moldavite one of the rarest and most fascinating gemstones on the planet — and how to distinguish authentic ones.
01What is moldavite?
Moldavite is not a mineral in the strict sense, but a tektite: a translucent green natural glass, composed mainly of silicon dioxide (SiO₂), the same chemical basis as quartz. What makes it unique are the trace elements and inclusions that fused within it at the time of its formation.
Its color ranges from bottle green to olive green to lighter and brighter shades, and its typical undulating surface — grooved, wrinkled and at times sculpted — is the signature of the violent cosmic journey that gave it birth. Learn more about its history in curiosities and information about moldavite.
02A truly cosmic origin
About 15 million years ago a huge meteorite hit central Europe, forming the Nördlinger Ries crater in what is now southern Germany. The energy of the impact was so great that it vaporized and melted terrestrial rocks, launching the molten glass to a very high altitude.
Cooling during reentry, the fragments fell into a dispersion field located in present-day Czech Republic, especially along the Moldau (Vltava) river — from which the stone takes its name. This is where the only authorized deposit in the world is still found today.
Map of the dispersion field / Moldau river03Physical properties
| Classification | Tektite (amorphous natural glass) |
| Composition | Silicon dioxide (SiO₂) with aluminum, iron, magnesium, and potassium oxides |
| Color | Green, from bottle to olive to bright green |
| Hardness (Mohs scale) | 5 to 7 — delicate gemstone, to be handled with care |
| Luster | Vitreous |
| Transparency | Translucent to transparent |
| Surface | Undulating, grooved, with pitting typical of erosion |
| Inclusions | Gas bubbles and lechatelierite (fused silica) |
A gemstone to protect
With average hardness and a certain fragility, moldavite should be worn with care. For daily use, we recommend necklaces and pendants with protective settings, which are safer than rings. Avoid impacts, ultrasound, heat, and aggressive chemicals; clean with lukewarm water, mild soap, and a microfiber cloth.
04How to recognize authentic moldavite
Being rarer than diamonds, moldavite is unfortunately highly imitated with simple melted green glass. Learning to recognize it is essential before any purchase:
Surface
Wavy "steam" texture, irregular grooves and wrinkles: difficult to replicate in molded imitations.
Inclusions
Round gas bubbles and lechatelierite filaments are typical clues of natural formation.
Color and light
A deep and translucent green, never too bright or uniformly "glassy."
Certificate
The ultimate guarantee. Each certified piece is verified for origin, quality, and authenticity.
Why it's important →05The forms of moldavite
Moldavite comes in very different types, each with a particular charm and use:
Raw
The most natural and collected form, with its sculpted surface intact. Perfect for collectors and enthusiasts.
Faceted
Precisely cut to enhance transparency and brilliance, ideal for creating custom jewelry.
In-situ
Preserved in its original sediment, a small fragment of geological history for connoisseurs.
Angel Chimes
Rare specimens with delicate shapes, particularly sought after. Discover what Angel Chimes moldavites are and how rare they are.
Keep exploring
Find your authentic moldavite
Every piece in our collection is hand-selected at the source and accompanied by a certificate of authenticity. Italian specialists in moldavite.
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