The photos shows Smokey Quartz (top left), Carnelian (top right), Red Jasper (bottom left), Citrine (bottom right) and Bloodstone (middle).  You can also use Chrysocolla, Obsidian, Black Tourmaline and Hematite.

The Root or Base Chakra is associated with the colour red, or red/orange and is concerned with one's physical identity and self-preservation.  Located at the base of the spine, this chakra forms our foundation. It represents the element of Earth, and is related to our survival instincts and our sense of connection to our physical bodies and the physical plane. Ideally this chakra brings us health, prosperity, security and grounding.

At Tribes and Vibes, we have all of these crystals available as Tumblestones, and most are also available as a Crystal Pendant or Bracelets.