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Tubineus azureus

The geode was named for the geological formations of the same name, which are crystal-filled rock cavities prized by collectors. This small, cone-shaped plant has a brilliant shine that varies from bright blue to green along the exterior to pale lavender along the inside of the cone. The hard, abrasive texture of the plant is due to the presence of silicates throughout its tissues. The geode has an affinity for silica, which is absorbed from weathered rock and incorporated into the plant body. The crystalline structure of these minerals causes the brilliant multicolored shine of the geode when it bioluminesces. (Read more)
Young geode plants are abrasive in texture but still fairly flexible. They are collected and used as scouring implements for cleaning duties and as abrasive sandpaper for various kinds of construction. Older plants are quite rigid and hold water after a rain. They are collected for use as jars and cups for carrying, holding, and drinking liquids.

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