Questions with the keyword 'rock'

• What is the smallest rock you’ve ever seen and did you have to use a microscope ? by time43ear to Jess Comments: (No comments so far )
• what is the softest type of rock? by quiz43ear to Jess Comments: (No comments so far )
• How many different types of rocks are there in the world? by pass43ear and 1 other. to Jess Comments: (No comments so far )
• have u ever discovered a rare rock by away43ear and 7 others. to Jess Comments: (so far, 4s comments )
• what is the hardest rock to cut? by free43egg and 2 others. to Jess Comments: (No comments so far )
• whats your favourite type of rock? by exit43bat and 10 others. to Jess, Jason, Jenny Comments: (so far, 2s comments )