Rocks, Minerals and Volcanoes Quiz #846

About Rocks, Minerals and Volcanoes Quiz #846

Rocks, Minerals and Volcanoes Quiz #846 was the quiz for Monday, October 26, 2026: 10 questions: 3 easy, 4 medium and 3 hard. Everyone who played Rocks, Minerals and Volcanoes Quiz that day got the same quiz, and it stays here to play for 60 days.

The questions of Rocks, Minerals and Volcanoes Quiz #846

1. What are the smaller earthquakes that follow a large one called?
2. What is a hollow, round rock with crystals lining the inside called?
3. Where do most earthquakes happen?
4. Which gemstone, made of silica and water, flashes with rainbow colours?
5. Which is the thickest layer of the Earth, lying between the crust and the core?
6. The Hawaiian Islands formed as the Pacific Plate moved over what?
7. What is petrified wood?
8. Which huge diamond, found in South Africa in 1905, was cut into many stones, the two largest of which are in the British Crown Jewels?
9. Which gas makes up most of the gas released by volcanoes?
10. What is the tendency of a mineral to split along flat, smooth planes called?

The answer options and the answers appear only when you play the quiz, one question at a time.

New to Rocks, Minerals and Volcanoes Quiz? The rules, tips and common questions are on the Rocks, Minerals and Volcanoes Quiz page.

Other days of Rocks, Minerals and Volcanoes Quiz

• Rocks, Minerals and Volcanoes Quiz #849, Oct 29
• Rocks, Minerals and Volcanoes Quiz #848, Oct 28
• Rocks, Minerals and Volcanoes Quiz #847, Oct 27
• Rocks, Minerals and Volcanoes Quiz #845, Oct 25
• Rocks, Minerals and Volcanoes Quiz #844, Oct 24
• Rocks, Minerals and Volcanoes Quiz #843, Oct 23
• Today’s quiz, #851

Every day of the last 60 is in the puzzle archive.