Tocachi River jewel ice appears during the coldest winter months on the beach in Japan. This is a real thing 'jewel ice' or 'river ice'. It forms in the river and shines like jewelry in the absence of salt.
The jewels reflect the many changing colors of the sky. If you can endure the frigid temperatures, Tokachi River, Hokkaido is the place to be in January and February to view these beautiful formations.