I live and prospect in Oregon, and the water in winter is cold!
Here are the ones I am using for panning and highbanking: https://a.co/d/bzMrJGk. They are called "ThxToms Heavy Duty Rubber Gloves".
They are not insulated, so I usually use a pair of thin Columbia Omni Heat running gloves as liners. Lately, I haven't used the liners, and the rubber gloves have worked fine. Between highbanking with my GeoSluice, and panning, my hands are in the water quite a bit.
Best of luck. Go get some shiney!