1. Sandy beaches are mostly made of silica in the form of the mineral quartz 2. There are many colors of sand such as white, gray, gold with a mix of yellow, brown,red and black 3. Turtles lay there eggs on the sand 4. There is seven quadrillion five quadrillion grains of sand in the world(7,500,000,000,000,000,000). 5. Sand castle are created with sand 6. The recommended combination to create sand sculptures is 8 parts sand to 1 part water. 7. Hourglasses are made with sand. They are used to measure time. 8. Sandcastles are more dangerous than sharks Sandcastles have caused 16 deaths compared to the 12 killed in shark attacks. 9. The largest and longest sand castle was made in Florida. 10. The tallest sand castle was 50 feet high.