Bhasma (Sanskrit: भस्म, meaning "ash" or "that which has been burnt") refers to a class of calcined mineral and gemstone preparations central to the classical Indian medical system of Ayurveda. When prepared from gemstones specifically, the preparations are termed ratna bhasma or mani bhasma — ratna and mani both being Sanskrit words for gem or jewel. These fine powders are produced through a rigorous process of repeated incineration and trituration, and are prescribed in Ayurvedic practice for internal therapeutic use. They are entirely distinct from the wearing of gemstones for astrological or talismanic purposes, as practised under the navaratna tradition.

Preparation

The manufacture of bhasma follows protocols documented in classical Ayurvedic texts including the Charaka Samhita, Sushruta Samhita, and Ashtanga Hridayam, as well as the modern Ayurvedic Pharmacopoeia of India, published by the Government of India's Ministry of AYUSH. The general process involves several defined stages:

• Shodhana (purification): The raw gemstone material is subjected to preliminary purification, typically by quenching heated material in herbal decoctions, oils, or other prescribed media. This is intended to remove impurities and render the material suitable for further processing.
• Marana (incineration): The purified material is ground with specified herbal juices — often the juice of Aloe vera or other botanicals — formed into small cakes or pellets, and fired in a sealed clay crucible (sharava samputa) at controlled temperatures. This cycle of grinding, wetting with herbal juice, and firing is repeated many times — classical texts prescribe anywhere from seven to over one hundred repetitions depending on the gem material.
• Quality testing: The finished bhasma is assessed by traditional criteria: it should be impalpably fine (floating on water without sinking, or leaving no gritty sensation when rubbed between the fingers), uniform in colour, and free from metallic lustre.

The repeated heating cycles are understood in Ayurvedic theory to transform the crystalline mineral into a bioavailable, therapeutically active form. From a materials-science perspective, the process converts the original mineral phases into oxides and other compounds; the herbal juices contribute organic residues that may influence the final chemistry, though the precise pharmacology of ratna bhasma preparations remains an active area of research in Indian pharmaceutical science.

Gemstones Used

Classical texts describe bhasma preparations for a range of gem materials, broadly corresponding to the navaratna (nine gems) of Vedic astrology, though the therapeutic and astrological traditions operate on separate theoretical frameworks. Commonly described ratna bhasma include:

• Manikya bhasma — prepared from ruby (manikya)
• Mukta bhasma — prepared from pearl (mukta); pearl-based preparations are among the most widely used and best-documented in contemporary Ayurvedic practice
• Pravala bhasma — prepared from coral (pravala)
• Vaidurya bhasma — prepared from cat's-eye chrysoberyl (vaidurya)
• Pushparaga bhasma — prepared from yellow sapphire or topaz (pushparaga)
• Vajra bhasma — prepared from diamond (vajra); one of the most complex and strictly regulated preparations

The quality and provenance of the source gem material are considered significant in classical formulation, with natural, untreated stones generally specified. The use of synthetic or heavily included material is regarded in traditional texts as producing inferior or potentially harmful preparations.

Therapeutic Context

Within Ayurvedic theory, ratna bhasma are prescribed to balance the three doshas (constitutional principles: vata, pitta, and kapha) and to address a range of conditions. Mukta bhasma, for instance, is classically indicated for conditions associated with excess pitta, including hyperacidity and inflammatory states. Pravala bhasma is similarly used in respiratory and digestive contexts. Vajra bhasma, prepared from diamond, carries the most elaborate preparation requirements and is considered among the most potent — and most potentially hazardous if improperly prepared.

The Ayurvedic Pharmacopoeia of India provides standardised monographs for a number of bhasma preparations, establishing criteria for identity, purity, and preparation method. Research into the particle characteristics of finished bhasma — including studies published in peer-reviewed journals of pharmacognosy and traditional medicine — has confirmed that properly prepared preparations consist of nanoparticulate mineral matter, which may partly account for their claimed bioavailability.

Distinction from Astrological Gem Use

It is worth emphasising the conceptual boundary between ratna bhasma and the astrological wearing of gems. The navaratna tradition prescribes specific gemstones to be worn in contact with the skin to channel planetary influences; this is a practice rooted in Vedic astrology (Jyotisha) rather than in Ayurvedic pharmacology. Bhasma preparations, by contrast, are ingested medicines operating within the humoral and elemental framework of Ayurveda. A practitioner might prescribe both simultaneously for different purposes, but the two traditions rest on distinct theoretical foundations and should not be conflated.

Note on Safety and Regulation

The internal use of mineral- and gem-derived preparations is subject to regulatory oversight in India under the Drugs and Cosmetics Act, and bhasma products are required to meet pharmacopoeial standards before sale. Outside India, the regulatory status of such preparations varies considerably by jurisdiction. Concerns about heavy-metal content have been raised in relation to certain mineral bhasma (particularly those derived from lead or mercury compounds), though gem-derived preparations such as mukta and pravala bhasma have a different compositional profile. Individuals considering any bhasma preparation should consult a qualified Ayurvedic practitioner and be aware of applicable local regulations.