The six chakra resonates with the vibration of the color indigo.
Sixth Chakra Issues and Imbalances –
Lack of concentration and focus
Lack of decisiveness
Perceived blockages and obstacles
Crystal suggestions for the Sixth Chakra | Third Eye Chakra
Albite, Amethyst, Ametrine, Apatite, Apophyllite, Atacamite, Azeztulite, Azurite, Beta Quartz, Biotite, Blizzard / Gabbro Stone, Cacoxenite, Carrollite, Chrysocolla, Danburite, Dioptase, Dumortierite, Electric Blue Obsidian, Fluorite, Garnet, Gaspeite, Goethite, Goldstone, Herkimer Diamond, Howlite, Iolite, Kyanite, Kunzite, Lapis Lazuli, Lepidolite, Malachite with Azurite, Mica, Moldavite, Muscovite, Phenacite, Quartz, Quartz with Epidote, Purple Fluorite, Rholite, Royal Sapphire, Rutilated Quartz, Seraphinite, Serpentine, Soapstone, Sodalite, Snow Quartz, Sugilite, Super Seven, Tigers Eye, Turquoise, Ulexite, Unakite, Wulfenite, and Zebra Rock.