| Ocos Geodes |
| SpiritRock Shop |
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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 # 1-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Beautiful black, white and clear swirls on the polished edge with well formed clear quartz crystals with black inclusions. This pair weighs 20.5g |
| Item # 2-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Clear quartz with black and white inclusions in the polished edge with well formed quartz crystals in the vugs. This pair weighs 28g |
| Item # 3-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Grey, white and clear wisps with a touch of mahogany on the polished edge with well formed quartz crystals in the vugs. This pair weighs 30.5g |
| Item # 4-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Clear, tan, white, grey and clear wisps on the polished edge with well formed quartz crystals This pair weighs 36g |
| Item # 5-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, mahogany and white swirls and wisps on the polished edge with well formed quartz crystals in the vugs with black inclusions. This pair weighs 30g |
| Item # 6-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, black, grey, white and clear wisps on the polished edge with well formed quartz crystals in the vugs. This pair weighs 22.5g |
| Item # 7-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Grey and clear band around a polished crystalline center with touches of mahogany on the polished edge. Vugs have quartz crystals. This pair weighs 33g |
| Item # 8-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Item # 9-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Item # 10-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, clear and white swirling lines on the polished edge. Vugs have druzy quartz crystals. This pair weighs 18.5g |
| Item # 11-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Item # 12-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Grey and clear band around pinkish fortification lines on the polished edge. Vugs have druzy quartz crystals with a pinkish tint. This pair weighs 30g |
| Item # 13-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, white clear and black mottling around crystalline quartz center vugs. This pair weighs 36.5g |
| Item # 14-OGP11160010 Polished Ocos Geode Pair $8.00 |
| Black, white and clear swirls lines on the polished edge. Vugs have druzy quartz crystals. This piece had natural fracture which broke off during cutting and polishing. Left click photos for larger view This pair weighs 33g |
| Item # 15-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, clear and white lines on the polished edge. Vugs have druzy quartz crystals with goethite inclusions. This pair weighs 27g |
| Item # 16-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, white and black switls on the polished edge surrounds a crystalline center. Vugs have well formed quartz crystals. This pair weighs 30g |
| Item # 17-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Black, white and mahogany lines on the polished edge. Vugs have druzy quartz crystals. This pair weighs34g |
| Item # 18-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Tan, white clear and grey lines on the polished edge. Vugs have druzy quartz crystals with goethite inclusions. This pair weighs 27g |
| Item # 19-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Black, clear and grey mix on the polished edge. Vugs have druzy quartz crystals with minor goethite inclusions. This pair weighs 19g |
| Item # 20-OGP11160010 Polished Ocos Geode Pair $10.00 |
| Stunning shades of grey and white surround this beautiful clear crystalline center with vugs displaying well formed quartz crystals. This pair weighs 20g |
| Grey, black, white and clear swirls around a polished crystalline center with touches of mahogany on the polished edge. Vugs have quartz crystals. This pair weighs 34.5g |
| Grey, black, white and clear swirls around a polished crystalline center with touches of mahogany on the polished edge. Vugs have quartz crystals. This pair weighs 20.5g |
| Tan, clear and white feathering lines on the polished edge. Vugs have druzy quartz crystals, some with dark inclusions. This pair weighs 33.5g |
