Mohs' Scale of Minerals Hardness Coffee Mug Candle Holder Rutile Sphere: $5

Rutile Sphere: $5

Obsidian: highly protective stone

Make a statement for cleaner oceans with our Sterling Silver Oyster Shell Charm

or Hercules stealing the golden apple of immortality

It’s up to you

Mohs' Scale of Minerals Hardness Coffee Mug Candle Holder Rutile Sphere: $5With its sleek design and cool color palette, the Moh's Scale of Mineral Hardness Mug feels just as at home in the field as it does at the breakfast table. Featuring 19 minerals with hardness numbers, chemical formulas, and identifying characteristics, it's the perfect companion for geologists, rock collectors, and anyone who approaches the making of a cup of coffee with scientific rigor. Perfect for any hot beverage: coffee, tea, hot chocolate,