Diamond

10

Corundum

9

Ruby

9

Sapphire

9

Alexandrite

8.5

Chrysoberyl

8.5

Rhodozite

8

Spinel

8

Taaffeite

8

Topaz

8

Yag

8

Aquamarine

7.5 – 8

Beryl

7.5 – 8

Emerald

7.5 – 8

Gahnite

7.5 – 8

Painite

7.5 – 8

Phenacite

7.5 – 8

Almandine

7.5

Andalusite

7.5

Euclase

7.5

Hambergite

7.5

Uvarovite

7.5

Ceramic Streak Plate

7.5

Andradite

7 – 7.5

Cordierite

7 – 7.5

Danburite

7 – 7.5

Garnet

7 – 7.5

Iolite

7 – 7.5

Rhodolite

7 – 7.5

Staurolite

7 – 7.5

Tourmaline

7 – 7.5

Amethyst

7

Citrine

7

Dumortierite

7

Prasiolite

7

Rock-Crystal

7

Quartz (Smoky, Rose)

7

Tigers Eye

7

Zircon

6.5 – 7.5

Agate

6.5 – 7

Axinite

6.5 – 7

Chalcedony

6.5 – 7

Chloromelanite

6.5 – 7

Chrysoprase

6.5 – 7

Demantoid

6.5 – 7

Petrified Wood

6.5 – 7

Heliotrope

6.5 – 7

Jadeite

6.5 – 7

Jasper

6.5 – 7

Kornerupine

6.5 – 7

Peridot

6.5 – 7

Sard

6.5 – 7

Tanzanite

6.5 – 7

Ziosite

6.5 – 7

Idocrase

6.5

Saussurite

6.5

Sinhalite

6.5

Smaragdite

6.5

Steel File

6.5

Sillimanite

6 – 7.5

Epidote

6 – 7

Cassiterite

6 – 7

Epidote

6 – 7

Hiddenite

6 – 7

Kunzite

6 – 7

Unakite

6 – 7

Amazonite

6 – 6.5

Aventurine

6 – 6.5

Feldspar

6 – 6.5

Benitoite

6 – 6.5

Ekanite

6 – 6.5

Labradorite

6 – 6.5

Moonstone

6 – 6.5

Nephrite-Jade

6 – 6.5

Petalite

6 – 6.5

Prehnite

6 – 6.5

Pyrite

6 – 6.5

Rutile

6 – 6.5

Strontium

6 – 6.5

Titanate

6 – 6.5

Amblygonite

6

Bytownite

6

Orthoclase

6

Sanidine

6

Thulite

6

Tugtupite

6

Hematite

5.5 – 6.5

Opal

5.5 – 6.5

Rhodonite

5.5 – 6.5

Tremolite

5.5 – 6.5

Actinolite

5.5 – 6.5

Anatase

5.5 – 6.5

Beryllonite

5.5 – 6

Elaeolite

5.5 – 6

Hauynite

5.5 – 6

Periclase

5.5 – 6

Psilomelane

5.5 – 6

Sodalite

5.5 – 6

Brazilianite

5.5

Chromite

5.5

Enstatite

5.5

Goldstone

5.5

Leucite

5.5

Moldavite

5.5

Natrolite

5.5

Willemite

5.5

Window Glass

5.5

Scapolite

5 – 6.5

Cancrinite

5 – 6

Chlorastrolite

5 – 6

Diopside

5 – 6

Hypersthene

5 – 6

Limenite

5 – 6

Lapis Lazuli

5 – 6

Lazulite

5 – 6

Tantalite

5 – 6

Turquoise

5 – 6

Datolite

5 – 5.5

Obsidian

5 – 5.5

Sphene

5 – 5.5

Thomasonite

5 – 5.5

Steel Knife Blade

5.5

Apatite

5

Augelite

5

Dioptase

5

Hemimorphite

5

Smithsonite

5

Wardite

5

Kyanite

4.5 – 7

Apophyllite

4.5 – 5

Scheelite

4.5 – 5

Zincite

4.5 – 5

Colemanite

4.5

Kurnakovite

4.5

Purpurite

4.5

Wire Nail

4.5

Variscite

4.5

Flourite

4

Barytocalcite

4

Magnesite

4

Rhodochrosite

4

Dolomite

3.5 – 4.5

Chalybite

3.5 – 4.5