Stone Horse Jewelry

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1. Can be scratched easily with a fingernail

• Sulphur: 1–1-1/2

 

2. Can be scratched with a fingernail

• Amber: 2–3

• Ivory: 2–4

 

3. Can be scratched with a coin

• Pearl: 3–4

• Coral: 3–4

• Malachite: 3-1/2–4

 

4. Can be scratched easily with a knife; cannot scratch glass

• Rhodochrosite: 4

 

5. Can be scratched with a knife; can just scratch glass

• Lapis lazuli: 5–6

• Turquoise: 5–6

• Opal: 5-1/2–6-1/2

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6. Can be scratched with a steel file; easily

       scratches window/bottle glass

• Moonstone: 6–6-1/2

• Tanzanite: 6-1/2–7

• Peridot: 6-1/2–7 Z

• ircon: 6-1/2–7-1/2

 

7. Easily scratches metal, glass and softer stones

• Citrine: 7

• Amethyst: 7

• Tourmaline: 7–7-1/2

• Garnet: 7–7-1/2

• Emerald: 7-1/2–8

 

8. Scratches quartz and softer stones 

• Topaz: 8

• Alexandrite: 8-1/2

 

9. Scratches topaz and softer stones

• Ruby: 9

• Sapphire: 9

 

10. Scratches ruby

• Diamond: 10