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Found this rock it looks like a vein of Jade but I have no idea. This is the inside of the rock. I found it already broke the rock is wet in the pic. It's is a hard rough texture and the green in the middle is smooth feeling. Found in Northern California on the west side of the Valley on the side of a country road. In the foot hills just about 20 min out of the valley. enter image description hereenter image description here

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Your rock is mostly like chalcedony, a micro-crystalline form of quartz based on texture and with small voids and crystals in the white portion. Typical conditions that produce jade rarely allows for voids in rocks.

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