Whenever you (or mobs) hold certain blocks or items they will produce particles periodically. They will also emit particles when on the ground waiting to be picked up.

In some cases the on the ground particle is slightly different than the held. Also, the block particles i used weren't always 100% accurate with the placed block (honey for example didn't really work well. so i went with a different particle)

The particles over the hand for held items are a "best approximation" as you can't really attach the particles to the hand or the item in the way you might like. The particle position varies based on camera view/angle.

There is no lighting with this addon. though it'll work fine with the other addon i made that puts lights ources where the player is for the blocks they hold. https://www.curseforge.com/minecraft-bedrock/addons/held-light-sources

Currently the list of emitting blocks and items for this addon are

blaze powder
blaze rod
block of coal
block of redstone
bottle o' enchanting
campfire
charcoal
coal
crying obsidian
dragon's breath
enchanted apple
enchanted book (any)
end rod
glistering melon
golden apple
golden carrot
gravel
honey block
honey bottle
honeycomb
honeycomb block
lava bucket
mycelium
nether star
powder snow bucket
red sand
red stone torch
redstone
sand
snow
snowball
soul campfire
soul torch
torch
water bucket

stone tools/weapons

iron tools/weapons

diamond tools/weapons

netherite tools/weapons

Held Particle Sources