Forearm pearls are nacreous stones grown by seeded nanophage colonies beneath the host’s fascia. They are commercially cultivated but remain dependent on the body that produced them.[1]
Growth and value
The recorded implantation takes approximately twenty minutes and typically produces a harvestable stone every eleven to fourteen weeks. Sand-seeded stones take about three months; tooth-seeded stones develop visible banding in six weeks. Clean stones sell for approximately $2,400, with higher values for even banding. Some hosts maintain four implants simultaneously.
Host dependency
After removal into air, the colony survives on stored substrate for about six days. It then stops maintaining the nacre, which becomes chalk-grey and disintegrates. Buyers consequently shifted from purchasing individual stones to renting the hosts who grow them.
References
- Nanophage Research — Forearm pearls Primary post
Original account caption inspected directly on September 14th, 2026.