Dragon Stone
Septaria egg of Madagascar
It's huge!
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 OSM62: Weight: 7.7kg - Height: 23/24cm It's huge!
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
Madagascar sawyer ammonite - Cleoniceras fern ammonite
Cleoniceras fern ammonite
100 million year old fossil
Bat - Antique 19th-century double bronze desk inkwell
Art Nouveau
Antique bezoar - Antipoison - Antidote
Once sold by the apothecary, bezoar, also known as gallstone, was reputed to have the same anti-poison properties as the legendary unicorn's horn, hence its excessively high price, also due to its great rarity.
An important piece in a cabinet of curiosities
Sold alone - Without stand, sold separately
Double skeleton
Sculpture on deer antlers
Unique piece
Flight of butterflies: Heliconius family under glass dome
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
Hermit crab in it's shell under glass bell jar
Dardanus megistos from Indo-Pacific zone
Entomological box
Composition with South American butterflies
Morpho and heliconius
barracuda in it's glass reliquary box - Sphyraena barracuda
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
Flight of Morpho menelaus butterflies under a Napoleon III-style cloche
Superb butterflies in an impressive electric blue
Madagascar sawyer ammonite - Cleoniceras fern ammonite
Cleoniceras fern ammonite
100 million year old fossil
Hermit crab in it's shell under glass bell jar
Dardanus megistos from Indo-Pacific zone
Scyphocrinus fossil: Sea lilies - 420 million years.
Antique surgical board
From Benjamin Bell's Complete Course in Surgery, published in 1796
Dragon Stone
Septaria egg of Madagascar
It's huge!
