Botryoidal Formation of Calcite Crystals in Septarian
Calcite Crystals in a Septarian Geode
Rare Barite Crystals in Septarian
Calcite Crystals on Display in this Septarian
Closeup view of Calcite Crystals in a Septarian
Septarian (aka Septerye or Dragonstone) is a very unique stone found in only a few places on earth. In the USA Septarians are found near Zion National Park in Southern Utah. They are also found in Mahajanga in Madagascar and Morocco. They were formed in an ancient sea floors during the Cretaceous Period (50-70 million years ago). As they weathered out of the gray or tan clay hills, one at a time, they could be picked up on the surface. Now bulldozers are required for their excavation, usually 20-30 feet underground. Septarian nodules are unusual to look at and can vary considerably in color and shape.
In contrast to most geodes, which are volcanic in nature, Septarians are a form of sedimentary geode. They formed on sea beds millions of years ago and, when they dried out, they cracked and formed hollow interiors. The interiors usually become either partly or completely full with other minerals, such as calcite, giving Septarian its unusual texture and features. Volcanic eruptions killed the sea life and they became trapped in the sediment and formed mud balls, the ocean receded and the balls were left to dry and crack. The ocean returned depositing more shell life above them. As this decomposed, calcite from shells was carried down into the cracks of the mud balls, calcite crystals formed. A thin wall of calcite was transformed into Aragonite dividing the Bentonite clay (shale) exteriors from the calcite centers. Because of this dividing wall (septum in Latin) the geodes are called Septarians.
Yellow centers - Calcite Gray rock - Bentonite
Brown lines - Aragonite White or clear – Barite
Septarian is also known as 'Dragon Stone' Its name 'Dragon Stone' comes from an old Malagasy legend. It is said that when the 'Dragons' died out they fossilized & became part of the sea bed that later became Septereye/Septarian & it is this formation that resembles the 'Scales of Dragons' !! Septarian concretions or Septarian nodules, are concretions containing angular cavities or cracks, which are called "septaria". The word comes from the Latin word septum; "partion", and refers to the cracks/separations in this kind of rock. One occasionally finds the erroneous explanation that it comes from the Latin word for "seven", septem, referring to the number of cracks that commonly occur, but this is incorrect. Septarians may have openings called Vugs ranging in size from large to small, large being cavernous and small being pencil tip size.
The finest quality Septarian comes from Utah
Item # 1SEP09219499
Polished Septarian Geode with Nice Calcite and Aragonite Crystals
Stunning Septarian Nodule with nice yellow Calcite and brown Aragonite Crystals. This piece was hand cut and polished in Utah. An Acrylic stand is included with this Geode half for display. An excellent example of the unique Utah Septarian!
This specimen weighs 61.7oz or 3.86 lbs (1.752kg) measures 6 x 5.5 x 2.7 inches (15.2 x 14 x 6.8cm)
Item # 2SEP09212984
Polished Septarian Nodule with Nice Calcite and Aragonite Crystals
Beautiful Septarian Nodule with nice yellow Calcite crystal vug and brown Aragonite Crystals. This piece was hand cut and polished in our workshop in North Carolina. The bottom is cut flat for display. An excellent example of the unique Utah Septarian!
This specimen weighs 43.1oz or 2.69 lbs (1.223kg) measures 5.4 x 3.8 x 2.4 inches (13.9 x 9.6 x 6.1cm)
Item # 3SEP09216379
Polished Septarian Nodule with Barite Calcite and Aragonite Crystals
Exceptional Septarian Nodule with rare clear barite with nice yellow Calcite crystals and brown Aragonite Crystals. This piece was hand cut and polished in Utah. An excellent example of the unique Utah Septarian!
This specimen weighs 92oz or 5.75 lbs (2.61kg) measures 7 x 6 x 2.8 inches (17.7 x 15.3 x 7.2cm)
Item # 4SEP09210574
Polished Utah Hollow Septarian Nodule Free Form with Beautiful Golden Crystals
Gorgeous Southern Utah Polished Hollow Septarian Geode Free Form with Beautiful Golden Crystals. This absolutely one of a kind exceptional Septarian geode is one of the most awesome pieces you'll find. It features brilliant shimmering and nicely terminated golden botryoidal formation dogtooth calcite. This piece is cut flat on the bottom for display. All sides are polished except the bottom. "Not another one like it in the World"
This piece weighs 34.2 oz or 2.14 lbs (972g) and measures 5.3 x 3.5 x 2.8 inches (13.5 x 9.1 x 7cm)
Item # 5SEP09211022
Rough Michigan Septarian Geode
Rare find from 1972 was this Septarian Geode in Black with White Quartz crystals from Upstate Michigan. This piece was hand dug and has been in our personal collection sincce 1972
This specimen weighs 47.1oz or 2.94 lbs (1.33kg) measures 4.3 x 3.7 x 3.5 inches (11 x 9.5 x 9cm)