Carne beach sits in Gerrans Bay on the Roseland Peninsula about a mile from the village of Veryan. It is a fairly sheltered sandy beach which joins up with Pendower beach to form a mile long stretch.
The large building to the left is the 4 star Nare hotel. If you look closely you can see the helicopter parked behind which took off just after the photos was taken.
As for the colour of the sea - this is what colour it came out. Not Photoshop trickery!