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
Antique surgical board
From Benjamin Bell's Complete Course in Surgery, published in 1796
Louis Philippe period hanging table lamp
Period: July Monarchy around 1835-1845, still in transition from Rococo to the previous Restoration period.
Bronze with medal patina and cobalt blue blown glass.
Former oil night lamp.
Beautiful presence and intact patina, complete system.
Anatomic lithography: "Traité complet de l'Anatomie de l'Homme"
by Dr Bourgery and draughtsman Jacob
Volume 3 - 1844
Entomological composition of beetles
27 specimens make up this picture
Black entomological box with gold fillet, hand-crafted by an bookbinder craftsman in Anjou
Anatomical chart by Ludovic Hirschfeld drawn by Léveillé
From Traité et iconographie du système nerveux et des organes des sens de l'homme avec leur mode de préparation
Published in 1866
Lithography
You buy 1 plate, not the whole set
Polished Oryx Skull for Hanging
South African Oryx gazella
Wall Trophy
Octopus Tentacle Diaphanisation - Octopus vulgaris
Biological preparation
The purpose of diaphanisation is to make fabrics transparent. The fabrics are made transparent using a chemical process, and specific dyes are used.
The flesh is made transparent, and here the dyes will adhere to the skin that has not been removed.
All tentacles are different: illustrative photos
Double skeleton
Sculpture on deer antlers
Unique piece
European lobster - Beauchêne explosion style under glass
Homarus gammarus
By Will Never Die
Available in shop only - No shipping
Painted botanical plate - Cryptogamy
Voyage to the South Pole and Oceania on the corvettes the Astrolabe and the Zélée, executed by order of the king during the years 1837-1838-1839-1840 under the command of M. Dumont-d'Urville captain of vessel
Published in 1846
Atlas of Natural History - Botany
Cryptogamy
Box of rubber washers for hot water bottles
In its original cardboard box
1939/1940
New Old Stock
Leaves butterflies under oval glass bell - Kallima Inachus
Deer antler sculpture - Snake and Skulls Totem on pedestal
Material : Antler
Origin: Indonesia
Diaphanization of a frog - Pelophylax ridibundus crossbred INRA (RIVAN92 strain)
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!
Not a protected species
De l'Homme et de la Femme (Of Man and Woman)
By M. de Lignac - Volume 3
Anatomy of procreation - 1779
Dragon Stone
Septaria egg of Madagascar
