Obsidian, yin & yang, María, rudraksha, sunstone, rose quartz.
 
Obsidian's benefits center around powerful protection, deep grounding, and rapid transformation, acting like a "psychic vacuum cleaner" to draw out negativity, stress, and hidden truths for healing, clarity, and self-discovery, especially linked to the root chakra for stability and authenticity. It's used for mental clearing, releasing trauma, improving focus, strengthening relationships, and spiritual growth, supporting confronting inner "demons" to find your life force. 
Spiritual & Emotional Benefits:
Protection: Shields against negativity, psychic attacks, and negative energies in your environment.
Truth & Clarity: A "stone of truth" that reflects reality, dispelling illusions and revealing hidden issues for resolution.
Grounding: Connects you to the earth, offering stability, security, and presence, especially useful for scattered energy.
Healing & Transformation: Brings deep-seated issues (trauma, anger, fear) to the surface for processing and release, facilitating profound change.
Focus & Mental Clarity: Clears mental clutter, helping with decision-making and self-discovery. 
Relational & Personal Growth Benefits:
Relationship Mirror: Acts as a mirror for self-reflection, promoting honesty and open communication in connections.
Authenticity: Pushes you to explore your depths, confront your "shadow self," and live more authentically.