Understanding chance to poison

The support gem chance to poison can be used by any skill which hits.
However, IIUC, only physical and chaos damage can generate poison damage. Right?
So linking chance to poison on a skill such as spark, which can create a lot of hits and which does zero physical or chaos damage, has many chances to cause poison - right? - but the only poison damage will be based on the tiny bit of added chaos damage from the support gem chance to poison itself - and thus be negligible - right??

All correct. Which is why poison spark builds use phantasmal spark and ashes of the stars which converts 100% of the damage to chaos so it gets the full effect of poison.

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gladiatorpie wrote:

All correct. Which is why poison spark builds use phantasmal spark and ashes of the stars which converts 100% of the damage to chaos so it gets the full effect of poison.

when you can read this is what you can do with the game!

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gladiatorpie wrote:

All correct. Which is why poison spark builds use phantasmal spark and ashes of the stars which converts 100% of the damage to chaos so it gets the full effect of poison.

Thanks.
I didn't know there was a "poison spark build". I just thought I'd try it out, but obviously it won't work.
When I put ashes of the stars into Poe wiki I get an amulet that doesn't seem to have anything to do with damage conversion?? (And anyhow, it looks like that amulet can only drop in the very endgame, which makes that idea useless for any "build" for me in SSF, since if can get the amulet already I don't need the build!😅)
When I put phantasmal spark into the wiki I don't get anything...?

with 20 quality phantasmal spark and an ashes with 30 quality roll, spark reaches 50 quality, which in turn converts 100% of the lightning damage of spark to chaos. then it's just a spell that deals only chaos damage and can be played as a poison build