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greenstoneGREE'NSTONE, n. [so called from a tinge of green in the color.] A rock of the trap formation, consisting of hornblend and feldspar in the state of grains or small crystals. |
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greenstoneGREE'NSTONE, n. [so called from a tinge of green in the color.] A rock of the trap formation, consisting of hornblend and feldspar in the state of grains or small crystals. |