Serendibite only appears at the depths between 996m and 999m inclusive, which is right before purple stone. However, within the very tight space it sits in, it is one of the most commonly generated ores. Sometimes you can get serendibite as commonly as five in a straight line.
It is valuable in trading so you should buy more from the Marketplace whenever you get the rare chance, otherwise it can be sold for around 2,000 gold each.
To reduce the time it takes to mine it, try using a Guilded Gold pickaxe since it can mine serendibite faster than most picks. Mithril pickaxe, though hard to obtain, has the top power, so use that if you have it.
- Serendibite was named after the old name for Sri Lanka: Serendib.
- It is also known for being the longest ore to mine in the entire game, Garnet formerly being the longest, but has now been made easier, potentially due to the crowded Staff Room servers.