When it has finally dried, you will have your own geode
that looks kind of like an old sandy rock on the outside, but has beautiful crystals on the inside.
Diagenetic (post-depositional) processes involving the circulation of low-temperature water (probably seawater, supplying the Sr) and the decomposition of organic material (yielding sulfate) resulted in strontium enrichment and the deposition of celestine (strontium sulfate) crystals as geodes, nodules and concretions.
Narrow, very neatly cut rectangular pits 10 to 15 meters deep are dug by hand in search of the celestine geodes. The pits are larger at the top, with climbing benches on the way down.
Celebrate the festive season with Stefan Hafner's Lunari, Geode
and Young Chic collections now available at the Stefan Hafner Boutique in BurJuman Centre and at select Damas Les Exclusives Boutiques in Dubai.
Goethite crystals do not occur in or on the large amethyst crystals within the main portion of the geode. Microscopic euhedral quartz (II) crystals also occur scattered about the surface of the calcite scalenohedrons, and tiny quartz (II) crystals commonly cluster around the sheaf-like bundles of goethite (Fig.
Following its formation near the bottom of a solidifying lava flow, the amethyst geode became lined with banded agate.
The lowest exposed interval is a shaley siltstone containing very few geodes. Immediately above this is a massive siltstone ledge, which is probably dolomitic.
Geodes collected from this layer are easily recognized by their distinctly green exterior.
Co-ordinator Martha Cunningham-Closs says the formation of GEODE
resulted as a solution to assist people who suffered financial hard-ship from an Inco strike about 10 years ago.