Blue Gemstones

Blue crystals, stones & gemstone names

• Sapphire Mohs 9.0
• Lapis Lazuli
• Gypsum Mohs 1.5–2 (defining mineral for 2)
• Agate Mohs 6.5–7
• Garnet Mohs 6.5–7.5
• Turquoise Mohs 5–6
• Topaz Mohs 8 (defining mineral)
• Aquamarine Beryl Mohs 7.5–8.0
• Tanzanite Mohs 6.5
• Chalcedony Mohs 6–7
• Zircon Mohs 7.5
• Fluorite Mohs 4 (defining mineral)
• Spinel Mohs 7.5–8.0
• Chrysoberyl Mohs 8.5
• Larimar Mohs 4.5 - 5
• Labradorite Mohs 6–6.5
• Jadeite Mohs 6.5–7
• Apatite Mohs 5 (defining mineral)
• Azurite Mohs 3.5 to 4
• Vivianite Mohs 1.5–2
• Kyanite Mohs 4.5–5 parallel to one axis 6.5–7 perpendicular to that axis
• Sodalite Mohs 5.5–6
• Barite Mohs 3–3.5
• Serpentine Mohs 2.5–6 (original) 3.5–4.0 (antigorite) 2.5 (lizardite) 2.5–3.0 (chrysotile)
• Celestine Mohs 3.0–3.5
• Amazonite Mohs 6.0–6.5
• Chrysocolla Mohs 2.5–3.5 (7 for chrysocolla chalcedony, high-silica content)
• Diopside Mohs 5.5–6.5
• Angelite Mohs 3.5
• Variscite Mohs 4.5
• Alexandrite Mohs 8.5
• Smithsonite Mohs 4.5
• Apophyllite Mohs 4.5–5
• Watermelon Tourmaline Mohs 7.0–7.5
• Eudialyte Mohs 5–6
• Dumortierite Mohs 7–8.5
• Scapolite Mohs 5.5–6
• Pietersite Mohs 7
• Hemimorphite Mohs 4.5–5
• Aquamarine Mohs 7.5–8.0
• Cavansite Mohs 3 - 4
• Heliodor Mohs 7.5–8.0
• Okenite Mohs –5
• Iolite Mohs 7–7.5