Generally the white stones or green stones grind cooler. However a old fashioned grey stone will work just fine. Just do it slowly. Gently grind with a light touch maybe one or two strokes, keep your fingers as close to the tip of the back of the blade as you dare, that way you can feel it heat up and as soon as it feels even a little warmer then your flesh/blood, dunk in cool water (4 litres / 1 gallon is a good a amount) in a swirling motion until the blade is cold. Then start again.
Since you have a large chip and de-lamintion to remove, grind the blade first square until you remove the chip and there is no longer any de-lamintion visible then grind your 30º bevel. Its fast and safer.