अभ्रक
A sheet silicate, chiefly biotite — potassium magnesium iron aluminium silicate. Splits into thin elastic sheets.
Parthiva · mineral origin · Maharasa — the first of the eight
SHODHANA — NO MINERAL DRAVYA IS USED RAW
Heated red hot and quenched repeatedly in nirgundi swarasa, triphala kwatha or godugdha, then marana with a herbal bhavana over many puta. Abhraka bhasma is classically counted by the number of puta — shataputi is a hundred, sahasraputi a thousand.
TRADITIONAL VIEW, WITH SAFETY LIMITS
What the texts say Abhraka does
What the evidence says. Characterisation studies of abhraka bhasma exist. Clinical evidence for efficacy is not established.
Side effects and limits
A properly made bhasma is the claim; whether commercial material is properly made is the question. Mica dust is a documented occupational lung hazard, which is a manufacturing risk rather than a dosing one.
Avoid or ask first: Unmarana'd or poorly made bhasma, in any circumstance.; Pregnancy, in the absence of safety data.
A traditional classification, not a recommendation. The full safety record is below.
AS THE CLASSICAL TEXTS AND THE API PRESCRIBE
| Bhasma | 30–125 mg |
| Anupana | Madhu · Ghrita · Dugdha |
| Kala | Adhobhakta |
The puta count is not decoration: a low-puta bhasma has not lost its sheet structure and is a different material from a shataputi one.
Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.
| Rasa | MadhuraKashaya |
| Guna | SnigdhaGuru |
| Virya | Sheeta |
| Vipaka | Madhura |
| Doshakarma | Tridoshahara. |
| Upayukta anga | Abhraka bhasma |
Abhraka is classed among the Maharasa — the first of the eight.
| English | Mica, biotite |
| Hindi | Abhrak |
| Kannada | Abhraka |
Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check.
Raw mica powder is not abhraka bhasma and the difference is the entire preparation. Unmarana'd mica is inert at best and is a lung hazard as dust.
A sheet silicate, chiefly biotite — potassium magnesium iron aluminium silicate. Splits into thin elastic sheets.
A WAY TO REMEMBER IT
Abhraka is from abhra, a cloud — for the way the sheets separate like layered cloud. Mica is from the Latin micare, to glitter.
Abhraka is the first of the maharasa and abhraka bhasma is among the most used mineral preparations in Ayurveda, in rasayana and in kshaya.
Constituents. A sheet silicate, chiefly biotite — potassium magnesium iron aluminium silicate. Splits into thin elastic sheets.
| Status | Characterisation studies of abhraka bhasma exist. Clinical evidence for efficacy is not established. |
| The honest gap | Mineral and animal dravya are far less studied than plant dravya, and what study exists is chiefly characterisation and toxicology rather than clinical efficacy. |
A properly made bhasma is the claim; whether commercial material is properly made is the question. Mica dust is a documented occupational lung hazard, which is a manufacturing risk rather than a dosing one.
| Contraindications | Unmarana'd or poorly made bhasma, in any circumstance. Pregnancy, in the absence of safety data. |
| Interactions | No specific drug interaction is documented for this dravya. Bhasma preparations have not been studied for interaction. Any drug taken at the same time — separate by two hours. |
| Pregnancy and breastfeeding | Not established as safe. Avoid. |