Silver Tourmaline rocks aren't a standard terrarium stone, but when the name is used, it often refers to tourmaline-infused quartzite or metallic-gray stones with a shimmering, silvery appearance. These stones are eye-catching and have a sleek, almost futuristic look.

In terrariums, Silver Tourmaline-style rocks can be used for:

• Accent pieces to add a touch of sparkle or contrast

• Modern or mystical themes, especially paired with glassy substrates or minimalistic layouts

• Highlighting plants with silver or purple tones (like Peperomia or Fittonia)

They’re best used sparingly—as feature stones or in a minimalist setup—where their unique shine won’t overwhelm the natural vibe but will enhance it with a subtle, cosmic edge.