| Ocos Geodes |
| SpiritRock Shop |
| Lot of 3 beautiful Ocos Geode polished halves -dark grey and white with fine quartz crystals -reddish brown and white with clear quartz crystals -Black and white with quartz with inclusions |
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Many names have been given to geodes throughout the
world, but none so fitting as the Ocos Geode (some say
these are named for their source, the Orinoco River in
Brazil, others believe it came from the Portuguese word
for "hollow," you decide...)
Ocos formed some 130 million years ago in
basalt amygdules (a formerly open vesicle which has
been filled with a secondary mineral(s) precipitated from
low temp ground waters which penetrated into the rock).
Over the years the basalts have been weathered away
and left behind small geodes in what is now called
cascalho, a dark reddish brown soil in the Serra Geral
Formation.
Ocos are mainly found in the 3000 ft elevations of the
Tres Pinheiros (Three Pines) region. The geodes are
normally removed from the basalt by hand (which can be
difficult because their skin or outer shell of chalcedony is
relatively thin and often rope-like in formation). The Ocos
are then taken back down the steep mountains in burlap
sacks or buckets on horseback or by pack mules to the
town of Soledade to be cut and polished.
Thin shell Ocos called "casa fina" command a higher
price, but display less of the famous wavy or flame like
patterns on the rim. Ocos size is usually small (1-3 inches)
When cut, Ocos display brilliant drusy quartz linings on
tan, grey, brown or black shells with white waves or
flames. Many Ocos have inclusions in the quartz, rarely
amethyst.
Ocos Geodes aka Ochos Occos |
| Item # OG09106030 Lot of 3 Polished Ocos Geode (Half) $9.00 Quantity Available 1 lot |
| Lot of 6 beautiful Ocos Geode polished halves -reddish brown with clear quartz crystals -dark grey and white with fine drusy quartz crystals -Black and white with very fine drusy with geothite inclusions, wispy shell with rope formation -Blackand white with drusy quartz with inclusions |
| Item # OG09107060 Lot of 6 Polished Ocos Geode (Half) $21.00 Quantity Available 1 lot |
| Item # OG09101570 Large Polished Ocos Geode (Half) $18.00 |
| Beautiful roped exterior shell with grey, white and clear wisps on the polished edge with well formed crystals in the interior. This specimen weighs 6.4 oz (183g) and measures 3.5 x 1.7 x 2.2 inches (9 x 4.3 x 5.6 cm) |
| Item # OG09107350 Large Polished Ocos Geode (Half) $22.00 |
| Stunning crystal formation growth with artichoke or Babylon type formations in a natural display amphitheatre . This specimen weighs 4.9 oz (140g) and measures 4.1 x 1.6 x 1.8 inches (10.3 x 4 x 4.4cm) |
| Item # OG09102570 Large Polished Ocos Geode (Half) $16.00 |
| Well formed crystal points line the interior of this geode with wisps of black, white, red brown and clear on the polished edge . This specimen weighs 7.1 oz (202g) and measures 4.1 x 1.6 x 2.2 inches (10.2 x 3.9 x 5.6cm) |
| Item # OG09108350 Large Polished Ocos Geode (Half) $24.00 |
| Fabulous smoky quartz, clear quartz and drusy quartz line the interior roped formation with pronounced black, white and clear wisps lining the polished edge of this rare specimen. . This specimen weighs 4.2 oz (119g) and measures 3.9 x 1.6 x 1.8 inches (10 x 4.1 x 4.4cm) |
| Item # OG09104460 Large Polished Ocos Geode (Half) $18.00 |
| Deep opening lined with well formed clear quartz dotted with black goethite with small white calcite formation. . This specimen weighs 5.5 oz (156g) and measures 3.1 x 2.1 x 1.6 inches (7.9 x 5.3 x 4cm) |
| Item # OG09105460 Large Polished Ocos Geode (Half) $16.00 |
| Well roped exterior with larger white-ish quartz crystals with hematite influence on bottom producing reddish coloration in the mix of black, white, clear and grey wisps in the polished edge . This specimen weighs 5.6 oz (161g) and measures 3.2 x 1.9 x 1.8 inches (8.1 x 4.8 x 4.5cm) |
| Item # OG09109350 Large Polished Ocos Geode (Half) $22.00 |
| Weather worn roped smooth exterior with larger smoky quartz crystals lining the interior of this magnificent specimen! . This specimen weighs 4.4 oz (126g) and measures 3.6 x 1.7 x 1.5 inches (9.2 x 4.3 x 3.7cm) |
| Item # OG09106690 Large Polished Ocos Geode (Half) with pewter prospector $24.95 |
| Roped exterior with drusy smoky quartz crystals with black and white wisp swirls are the backdrop setting for this lucky prospector with his pan. Beveled edge glass stand glued to bottom of geode. . This specimen weighs 4.8 oz (136g) and measures 3.1 x 1.9 x 2 inches (7.8 x 4.7 x 5.6cm) |
| Notice to Our Customers We will be closed from May 18th through August 15th 2012 to relocate our business. Orders placed during this time will not be shipped until after August 15th. Purchases or Reservations will be honored in the date order they are received. 1st purchaser is served 1st. |