Mother-of-Pearl Shell Powder (Pteria martensii) is the finely ground inner shell layer of the pearl oyster, treasured for centuries in traditional Chinese medicine (TCM), Ayurveda, and beauty practices for its calming, cooling, and restorative properties. Known in TCM as Zhen Zhu Mu, it has been used both internally and externally as a soothing remedy for the spirit and a beautifying substance for the skin. In traditional practice, Mother-of-Pearl Powder is regarded as a cooling, sedative, and yin-nourishing substance that helps to calm the heart, anchor the spirit, and clear heat from the liver. It has been prescribed for restlessness, insomnia, dizziness, and eye conditions, as well as to stop bleeding and support wound healing. Externally, it has long been used as a cosmetic and skin tonic, applied to promote a clear, radiant complexion, reduce redness, and encourage skin repair. In Ayurveda, pearl and shell powders are considered rejuvenating (rasayana) substances, believed to restore vitality and balance excess heat in the body. Modern research has shown that Pteria martensii shell contains calcium carbonate, amino acids, and trace minerals, which may contribute to its calming, anti-inflammatory, and skin-regenerative actions. Its fine texture and mineral richness have made it an enduring ingredient in traditional remedies, natural cosmetics, and wellness preparations. Each batch of Mother-of-Pearl Shell Powder (Pteria martensii) is carefully cleaned, processed, and milled to a fine consistency, ensuring its purity, potency, and smooth texture. It can be taken in small measured amounts, blended into herbal formulas, or applied topically as part of skincare rituals. A time-honored jewel of the apothecary, it represents the union of inner healing and outer beauty.