Change subcategory to
Sort by

More Information

Oco geodes are mined in northern Rio Grande do Sul province in Brazil.  These geodes are quite popular given their smaller shape, thin skins, and wonderful agate in the shell with drusy quartz interiors.  Many of these geodes also contain goethite crystals (or another related iron mineral).  These geodes are approximately 138-127 million years old and are surface mined from outcrops in the Tres Pinheiros region of Rio Grande do Sul.  Most Ocos are between 1-3 inches in diameter although some larger and smaller are also occasionally available.  All of our Oco geodes are imported directly from the mine owner in Brazil.  Information source - "Geodes, Nature's Treasures" by Cross/Zeitner (2006) and Geode Gallery's supplier in Brazil.

All of our opened Oco geodes are sold only as a pair, either individually or in a bulk flat, with each geode already cut and polished.  We will not sell only one half of a matching pair.  Please click on the desired specimen(s) below for more details.  Please note that all pairs pictured below have some tissue paper wrapped around each half to protect the polished face/edge and for safe shipping - it is easily removable.  For Oco geodes in their rough form (not cut open) and guaranteed hollow, please visit our Whole Oco Geodes - Brazil page.

Simple Shipping:  In the United States, all orders over $100 receive free shipping!  Order subtotal $5 or less = $4.00 shipping; $5.01-$20.00 = $6.95 shipping; $20.01-$60.00 = $9.95 shipping, $60.01-$99.99 = $13.60 shipping, and all orders $100 or more ship for FREE!  International orders please contact us or use our secure shopping cart for your shipping costs.  If you do not want to order online through our secure shopping cart, please call or text Mike at (309) 335-6740 between 9am-5pm Central M-F.  If I cannot answer, please leave a voicemail with your name, return phone number, and a message that you would like to place an order over the phone.  I will return your call as soon as I am able, thank you!

OCOPAIR 01
OCOPAIR 01

1.85 x 0.8 x 1 in (cm?)

$ 5.00


View Item
OCOPAIR 02
OCOPAIR 02

1.7 x 1 x 1 in (cm?)

$ 5.00


View Item
OCOPAIR 03
OCOPAIR 03

1.35 x 0.9 x 1.3 in (cm?)

$ 5.00


View Item
OCOPAIR 04
OCOPAIR 04

1.6 x 1 x 0.75 in (cm?)

$ 5.00


View Item
OCOPAIR 05
OCOPAIR 05

1.6 x 1 x 0.75 in (cm?)

$ 5.00


View Item
OCOPAIR 06
OCOPAIR 06

2 x 1 x 1.2 in (cm?)

$ 5.00


View Item
OCOPAIR 07
OCOPAIR 07

1.75 x 1.2 x 0.8 in (cm?)

$ 5.00


View Item
OCOPAIR 08
OCOPAIR 08

1.6 x 0.85 x 0.9 in (cm?)

$ 5.00


View Item
OCOPAIR 09
OCOPAIR 09

1.85 x 1.25 x 0.8 in (cm?)

$ 5.00


View Item
OCOPAIR 10
OCOPAIR 10

1.8 x 1.2 x 0.7 in (cm?)

$ 5.00


View Item
OCOPAIR 11
OCOPAIR 11

2 x 1 x 0.85 in (cm?)

$ 5.00


View Item
OCOPAIR 12
OCOPAIR 12

1.85 x 0.75 x 1.2 in (cm?)

$ 5.00


View Item
OCOPAIR 13
OCOPAIR 13

1.8 x 0.75 x 1.4 in (cm?)

$ 5.00


View Item
OCOPAIR 14
OCOPAIR 14

1.9 x 1.15 x 1.25 in (cm?)

$ 5.00


View Item
OCOPAIR 15
OCOPAIR 15

1.75 x 1.15 x 1.4 in (cm?)

$ 5.00


View Item
OCOPAIR 16
OCOPAIR 16

1.25 x 0.9 x 1.3 in (cm?)

$ 5.00


View Item
OCOPAIR 17
OCOPAIR 17

1.5 x 1.25 x 0.7 in (cm?)

$ 5.00


View Item
OCOPAIR 18
OCOPAIR 18

1.5 x 1.15 x 0.75 in (cm?)

$ 5.00


View Item
OCOPAIR 19
OCOPAIR 19

1.5 x 1 x 0.9 in (cm?)

$ 5.00


View Item
OCOPAIR 20
OCOPAIR 20

1.85 x 1.2 x 0.7 in (cm?)

$ 5.00


View Item
OCOPAIR 21
OCOPAIR 21

1.7 x 1.4 x 1.25 in (cm?)

$ 6.00


View Item
OCOPAIR 22
OCOPAIR 22

1.5 x 0.8 x 1.5 in (cm?)

$ 5.00


View Item
OCOPAIR 23
OCOPAIR 23

2 x 1.15 x 0.55 in (cm?)

$ 5.00


View Item
OCOPAIR 24
OCOPAIR 24

1.5 x 1.1 x 0.8 in (cm?)

$ 5.00


View Item
OCOPAIR 25
OCOPAIR 25

1.7 x 1 x 0.75 in (cm?)

$ 5.00


View Item