Vedic
Navaratna reference table
The nine gems and their graha, with substitutes (upa-ratna), weekday, finger and its variants, metals, minimum weight range in ratti with gram and carat conversions, beeja mantra and japa count. Static lookup, no chart needed.
get/vedic/gemstones/navaratna
Response
Successful calculation
Example response
{
"ok": true
}