seeing that you guys really like trinkets was an opportunity to make a second part of this ideas. 
Ancient fossil
"an primordial object, this rock with endured bones inside it calls the hidden remanent of really old creatures. it can help you find items in the grass. but some bugs may be among them!
it makes that you can find consumable items like gold, alchemical energy, small food or even hero remain items {except runestones or potions/ scrolls} in 12% 15% 21% 30%, but also encounter bees ,or god larvae with effects depending of the region. [weakened/vulnerable * Weakened * vulnerable* -nothing- * adrenaline], with 10,16,21,25%
reflecting mirage
"its a broken mirror, but part of its essence travels to nearby creatures ,trying to weaken them. some parts of the mirror move inside violently, its not very gentle after all".
its makes that when an enemy dies it can be replaced by an mirror image with 20, 25, 30, 35% but it will also have 3 turns of amok and aggression with 25, 30, 34, 37%
odd hieroglyph
its an antique treasure. ancient letters decay on this stone tablet. but they hover over it?. the letters fly over the tablet making new words in ancient languages, they seem to summon more spells, but also absorbing other items in the dungeon
it makes that you can find 10,20,30,40% more scrolls and even some spells. but reduces potions and equipment drops chances {by monsters or wealth effects} by 5,11,22,33%