Brecciated Mookaite
SpiritRock Shop
Museum Specimens
Click on any photo to see a larger version
Official PayPal Seal
This is another new find from the outback of Western Australia. It occurs near Mooka Station in the Kennedy
Ranges about 100 miles inland from the coastal town of Carnarvon. This geologically interesting rock is actually a
brecciated radiolarite. Radiolarite or radiolarian chert is a high silica sedimentary rock which may be considered
a variety of chert. It is formed as primary deposits and contains radiolarian microfossils. Locally the varicolored
opaline to chalcedonic radiolarite is mined and used as a popular stone called Mookaite.

A brecciated variety of Mookaite has been found. It is from the same deposit as normal Mookaite, just a few
levels deeper in the ground. The Aussies are calling it “Brecciated Mookaite”. This stone is composed of opaque
segments bordered with translucent borders. This creates an interesting puzzle like mosaic of colors that ranges
from mustard yellows, creamy whites and tan browns. This Brecciated Mookaite really holds together well and
since almost all portions are the same hardness it takes an excellent polish with minimal undercut. As with any
brecciated material, there is a possibility of having small voids in the stone. It cuts and polishes nicely and will
work for small cabs all the way up to large specimens.
Here is a thick slice of BRECCIATED MOOKAITE that has been polished on one side and smooth cut on the other.
This unique piece has a real mix of inclusions! The larger tan chert appears as though it were dough or clay that
had been sliced leaving separation marks. The colors range from creams to tans and browns with splashes of
maroon. There is such a busy mix on this one...a fascinating specimen to look at closely!
Another rare collector piece from Australia!

This beautiful specimen measures 7.2 x 6.4 x 0.45 inches (slightly thicker than 7/16") or is 183 x 162 x 11mm
and weighs 1.09 lbs (494g)  
Item # BMPS04109993
Large Brecciated
Mookaite Polished Slab
from Australia

$110.00
Here is a thick slice of BRECCIATED MOOKAITE that has been polished on one side and smooth cut on the other.
There are some natural voids in the highly polished surface that produce a very interesting display specimen. The
colors range from creams to tans and browns with splashes of maroon. What appears to be dark fill areas are a
translucent pinkish light brown when held up to a light source or backlit. A very rare and collectible piece!  

This beautiful specimen measures 7 x 6 x 0.4 inches (slightly thicker than 3/8") or is 180 x 155 x 10mm,
and weighs 0.9 lbs (432g).   
Item # BMPS04109463
Large Brecciated
Mookaite Polished Slab
from Australia

$89.00