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 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
Bearded dragon - Pogona vitticeps - Bearded agama
Museum jar - Wet specimen
Entomological box containing a beetle
Species: Heliocopris dominus
Herbalist's or Pharmacist's jar
Antique blank label of the XVIIIth century
Entomological composition of beetles
27 specimens make up this picture
Black entomological box with gold fillet, hand-crafted by an bookbinder craftsman in Anjou
19th century pharmacy display blue jar
Blown glass
Man - Anatomical chart that can be disassembled
By Fernand Nathan Editeur publisher
Coloured chart with movable, cut-out and superimposed leaves
There are defects on the superimposed boards; the outer board, which was the man's torso, is missing, as are the lungs, which were above the heart. The left hand is missing, the arm being torn.
Flame gorgon - Red Whip Coral on pedestal - Ellisella grandis from Indonesia
Australian saltwater crocodile skull: Crocodylus porosus
Estuary crocodile
With its CITES permit
32cm
Can only be sold in the European Union- Shengen Area
Antique pharmacy display jar
Blown red glass
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
barracuda in it's glass reliquary box - Sphyraena barracuda
Entomological frame - Scarab Goliathus meleagris female with spread wings
Naturalist Magnifier
Morpho Didius butterfly from Peru
Dragon Stone
Septaria egg of Madagascar
