Dragon Stone
Septaria egg of Madagascar
Septaria Madagascar egg
Also known as Dragon Stone
Septaria is a stone composed of a mixture of yellow calcite and sandstone, found mainly on the island of Madagascar, characterized by highly visible shrinkage cracks. These highly visible cracks, known as Septa, fill with minerals over time.
When the stone is polished, these cracks stand out, giving it a dragon's egg appearance on the outside.
With time, tectonic movements, etc., the nodules can be fractured and new mineral solutions can invade the shrinkage cracks, often calcite.
In our case, Septaria has been polished into an egg shape and the interior has been invaded by a very fine crystallization of calcite. Beautiful crystals.
It's also easy to see why it's called Dragon's Stone: the exterior is very similar to a dragon's egg!
Sold without base
Ref OSM52: Weight: 5kg - Height: 19/20cm
Sold without the base
You can find available bases by typing ball base or egg base in the site search.
High base specially designed to hold a ball or egg
Perfect for ostrich eggs
Not suitable for emu, rhea or swan eggs, for example
Wooden base for ball or sphere - Base - support
Grey-Black patinated marble base for ball or sphere
Base - support
Diaphanization of a mouse - Mus musculus
Biological preparation
The aim of diaphanization is to render the tissues transparent through a chemical process, and specific dyes are used to highlight the skeleton.
You can see the bones through the skin!
Large Model
All specimens are different
Boule de Nancy - Genuine Mars Vulnerary Ball - Steel Ball
This iron-containing ball was once considered a miracle cure for many ailments and injuries.
The Boule de Nancy is sold individually in a small antique drugstore box
Unavailable today
Brown lace sea fan on a base
Brown Whip Coral
Flame gorgon - Red Whip Coral on pedestal - Ellisella grandis from Indonesia
Dragon Stone
Septaria egg of Madagascar
It's huge!
Natural Red Coral
Tubipora Musica
Sold with a CITES permit valid for the European Union - Schengen area
Cannot be sold outside the European Union
Anatomie de L'Homme - circa 1845
Volume 4 Atlas: Apparatus of nutrition - Angelology - Organs of circulation and respiration
Followed by his Atlas in black and white
By Dr. Bourgery and illustrator Jacob
Entomological shattering at La Beauchêne under glass case
Chrysochroa buqueti - the jewel beetle
The red speckled jewel beetle
By La Thanatothèque
Dragon Stone
Septaria egg of Madagascar
Clastic Mannequin - Dr. Auzoux's anatomical skinned
Cours d'opérations de chirurgie, démontrées au Jardin Royal
Course of surgical operations, demonstrated in the Royal Garden
Published in 1751 in Paris, by d'Houry, sole printer and bookseller to Monseigneur le Duc d'Orléans
Fourth edition
Illustrated with numerous plates and engravings in the text, including the famous plate of Poor Malabou and her scrotal elephantiasis on page 112/113, which the author mentions on page 373.
Entomological box: Beetles Goliathus meleagris from Congo
One with spread wings
Engraved swordfish rostrum from Borneo - Indonesia
XL Size - Dimensions with base: H99cm
Crucifix crab - Giant crab on wooden pedestal
Charybdis feriata
Origin: Philippines
Engraved horse skull
Papuan handicraft
Origin: West Papua
Entomological box
Composition with South American butterflies
Morpho and heliconius
Dragon Stone
Septaria egg of Madagascar
