Interesting Green Rock

[Ankle_Pick4]

Hi everybody I found this green rock on a gravel bar in Interior Alaska and could use help finding an ID. The green mineral seems to be banded around the rock the hardness seems to be 5.5-6.5. Definitely scratches glass. Not a color I’ve seen much around here. Thanks!

 

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[DDancer]

Definitely quartz in it, banded looks almost to be agate. The green mineral could be cooper or manganese. I'm leaning towards cooper for the coloration making it akin to chyscola banding. Lots of minerals to be found in Alaska gravels.