These Black Diamond tumbles have a beautiful deep lustre and are a striking addition to any crystal collection. Black crystals are powerful protectors — they absorb negative energy, create energetic boundaries, and help ground and anchor your energy field. Black Diamond in particular is associated with strength, clarity, and invincibility of spirit, making it a powerful stone for those seeking resilience and a strong inner foundation. Carry one for protection, keep one on your desk, or add it to a grid to anchor and ground your intentions.