Our online science mall at sciencemall-usa.com is a geek gift store for the adult science enthusiast, science educator, and science researcher. Our mission is to provide science gifts, science educational products, meteorites, necklace, pendant, earrings, and fulgurite lightning sand jewelry. We also sell school geology rock and mineral specimens, rare mineral matrix specimens, pallasites, tektites, Libyan Desert Glass, fulgurite lightning sand, Lichtenberg figures, Titanic coal, school rock collections, manganese nodules, elements of the periodic table, fossils and legal historical artifacts. Rare earth rock specimens such as ancient life stromatolites (earth's earliest life), shatter cones, banded iron formation, Greenstone belt BIF banded iron formation, KT/boundary, K-Pg boundary, radioactive minerals, science art posters, prints, curio desk displays, science jewelry pendant necklace earrings, hand crafted artisan jewelry for KennedyCoJewelry, are also our specialty.

Komatiite, Komati River, South Africa

Komatiite, Komati River Primordial Earth - New
Komatiite, Komati River Primordial Earth - New
Item# JPT-komatiite
Regular price: $245.00
Sale price: $199.95
Availability: Usually ships the next business day
This item is out-of-stock.

Product Description

Komatiite, Komati River Primordial Earth - New
Komatiite, Komati River, South Africa - Primordial Earth, Very Rare

Great rare authentic specimen. Fantastic spinifex textured bladed olivine is very evident! Exceedingly rare specimen.

Komatiite is a type of ultramafic mantle-derived volcanic rock. Komatiites have low silicon,potassium and aluminum, and high to extremely high magnesium content. Komatiite was named for its type locality along the Komati River, in South Africa.

Picture at LEFT is the back, or another side.

True komatiites are extremely rare. The age restriction (3.8 to 2.8 Ga) is thought to be due to cooling of the mantle, which scientists think may have been up to 500 degrees C hotter during the early to middle Archaean. The early Earth had much higher heat production, due to the residual heat from planetary accretion, as well as the greater abundance of radioactive elements.

Geographically, komatiites are restricted in distribution to the Archaean shield areas. Komatiites occur with other ultramafic and high magneian mafic volcanic rocks in Archaean greenstone belts.

Pristine volcanic mineralogy of komatiites is composed of forstertic olivine, calcic and often chromian pyroxene, anorthite and chromite. Some of the highest magnesian komatiites with clear textural preservation are those of the Weltevreden Formation of the Barberton belt in South Africa (as this specimen has). The spinifex textured bladed olivine is very evident. (The "spinifex" texture is named after an Australian grass that grows in clumps with similar shapes).

Komatiites are associated with nickel and gold deposits in Australia, Canada, South Africa and most recently in the Guinana shield of South America.

Size: 46mm L X 20mm W X 21mm D, Weight: 26.8 grams

Ships with certificate of authenticity, tag. display case and information about the geological importance of the specimen. Legally collected. Stands and cube not included.

One of the more important specimens to add to a serious rock and mineral collection.


Click on image to enlarge.