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 OSM55: Weight: 4.1kg - Height: 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
Anatomic lithography: "Traité complet de l'Anatomie de l'Homme"
by Dr Bourgery and draughtsman Jacob
Volume 3 - 1844
Hermit crab in it's shell under glass bell jar
Dardanus megistos from Indo-Pacific zone
Atlas of descriptive anatomy of the human body
Anatomy board
By Doctors Bonamy and Paul Broca
Draftsman: Emile BEAU
Published on July 1st 1854
Shark tooth fossil
Otodus Obliquus dating from the Ypresian: 50 million years ago
Naturalist Magnifier: caligo atreus
Butterfly - Natural History color plate
Entomology
You buy 1 plate, not the whole set
Entomological box containing a beetle
Species: Heliocopris dominus
Entomological box
Composition with 50 Butterflies
Dimensions: 26x39cm
The Anatomy by Heister
Complete with its 14 folding boards at the end of the book
Published in 1735
Dragon Stone
Septaria egg of Madagascar
Australian saltwater crocodile skull: Crocodylus porosus
Estuary crocodile
With its CITES permit
30cm
Can only be sold in the European Union- Shengen Area
Scyphocrinus fossil: Sea lilies - 420 million years.
Anatomie de L'Homme - 1831
Anatomy of Man
Volume 2 with its black and white Atlas - 99 lithography
By Dr Bourgery and the illustrator Jacob
Entomological box
Composition with South American butterflies
Morpho and heliconius
Anatomical chart by Paulet and Sarazin
From the Traité d'anatomie topographique (Treatise on topographical anatomy)
Published in 1867-1870
Chromolithography
You buy 1 plate, not the whole set
Dragon Stone
Septaria egg of Madagascar
