Black Obsidian Tower

Let’s talk Obsidian!

• Hardness Scale: 5 to 5.5
• Mineral Species: Igneous Glass
• Chemical Formula: Stricture can vary as it I not a crystalline mineral.. 70% Silicon Dixoide (SiO2) with other oxides like aluminum, magnesium, iron, sodium & calcium.
• Origin : Ceará, Brazil