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
display for crystal ball or ostrich egg
Not suitable for emu or swan eggs.
Wooden base for ball or sphere - Base - support
Grey-Black patinated marble base for ball or sphere
Base - support
Atlas of descriptive anatomy of the human body
Anatomy board
By Doctors Bonamy and Paul Broca
Draftsman: Emile BEAU
Published on July 1st 1854
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 frame - Scarab Goliathus meleagris female with spread wings
Entomological composition of beetles
28 specimens make up this picture
Black entomological box: 26x39cm
Bibliothèque Choisie de Médecine - Volume 16
Selected Library of Medicine
By François PLANQUE - 1761
Complete original edition with 10 fold-out plates
Leaves butterflies under oval glass bell - Kallima Inachus
Vertebra of Giraffe
Giraffa camelopardalis
With its CITES license
Not for sale outside the European Union
You are buying 1 vertebra
Deer antler sculpture - Totem Skulls on pedestal
Material : Antler
Origin: Hand-carved in Indonesia
Dragon Stone
Septaria egg of Madagascar
It's huge!
Painted papier-mâché anatomical model of the brain
Produced by Établissements Auzoux
Model No. 12 from the 1874 catalogue
Dismantlable, numbered model, used for medical teaching.
A rare item in excellent working condition
This is a 1:1 scale model of the brain, sold separately at the time as a demonstration model; it is not a brain that was found inside anatomical manikins.
Butterfly - Natural History color plate
Entomology
You buy 1 plate, not the whole set
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
19th century Herbalist's or Pharmacy crystal jar
Iris
Entomological composition of beetles
27 specimens make up this picture
Black entomological box with gold fillet, hand-crafted by an bookbinder craftsman in Anjou
Human jaws in porcelain mounted on a blackened wooden base
Anatomical dental model for dentists
19th century
Dragon Stone
Septaria egg of Madagascar
