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I inoculated nutrient agar with bacillus subtilis and it made a dark green colour on agar plates.
Montana Moss agate is well-known and comes from the Yellowstone River, but much of this stone is a red color as the soil there has a lot of red in it. This stone may be green, and it also commonly has blue, yellow, brown, black, white or red in the stones. Sometimes these other colors are the dominating color in a stone rather than the green color of the heart based Green Moss Agate.