Sink or Float: It’s About Specific Gravity

Gravity decides

Agarwood sinks when denser than water. More resin replaces wood, raising specific gravity—hence "sinks / half-sinks / floats" as a rough grade. Traditionally sinking means richer oil.

Don’t over-rely

But sinking only measures density, not necessarily better aroma. Some kyara is prized without chasing sink; oil-injection can fake it. Science summary; judge by scent and legal source.