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
display for ball or egg (small)
Material: Resin material
Wooden base for ball or sphere - Base - support
Grey-Black patinated marble base for ball or sphere
Base - support
Clastic Mannequin - Dr. Auzoux's anatomical skinned
Australian saltwater crocodile skull: Crocodylus porosus
Estuary crocodile
With its CITES permit
33cm
Can only be sold in the European Union- Shengen Area
European lobster - Beauchêne explosion style under glass
Homarus gammarus
By Will Never Die
Available in shop only - No shipping
Memento Mori sculpted from a deck of cards - Poker
Size M
RED color
barracuda in it's glass reliquary box - Sphyraena barracuda
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
Human jaws in porcelain mounted on a blackened wooden base
Anatomical dental model for dentists
19th century
184: Helleborus orientalis - Lenten Rose
Real framed and calligraphed Herbarium
Entomological box
Species: Papilio Bromus butterfly
Pick-up in store in Paris only
Red chalk drawing- Anatomical drawing
Anatomical study
Drawn by Eugène de Montchoisy in Saint-Brieuc in November 1840
These are not reproductions but original period drawings in red chalk.
You are purchasing one plate, not the entire set of plates
Entomological composition of beetles
28 specimens make up this picture
Black entomological box: 26x39cm
Dragon Stone
Septaria egg of Madagascar
It's huge!
Antique surgical board
From Benjamin Bell's Complete Course in Surgery, published in 1796
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
Rostrum of swordfish XXL size
Xiphias gladius
Dimensions: 111.5cm - EXCEPTIONAL SIZE
Dragon Stone
Septaria egg of Madagascar
