If they have been spoiled by an insect infestation, the insect damage and webbing will be very obvious.
Some molds will appear as dark or discolored spots.
If the nuts are rancid, that won't be seen but can be caught via smell and taste. Hopefully, your nose will pick it up before you taste it.
Bacterial contamination cannot be seen.
It looKs like mold
it would turn a grayest color and have an odor.
potassium cyanide is a poisen that is distinguised by its smell and taste of bitter almonds
Cyanide poisoning can make the breath smell like almonds.
It tastes like a candy cane. ?? Marzipan is made of ground almonds and sugar, so it tastes like very sweet almonds.
tastes like spoiled tuna
By Spoiled, I am going on you mean unfertilized. Most eggs will be fertilized, while the ones that are not, will turn white in most cases, and develop a fungus on them. The parents will pick those away usually.
Witchetty grubs are the larva of several types of moths. They are large and edible. They taste like almonds when they are eaten raw. Curl grubs look like witchetty grubs.
spoiled iced tea smell sour
it was be spoiled and chunks of gloppy milk.
It will have a very spoiled smell and it will taste very bad. Be extremely careful because it will not change color. It will look like it is not spoiled. However, do not be fooled. It is extremely dangerous. Don't be cheap. Spill it out immediately or if you do not you will be sick for days and you could possibly die. Spoiled soybeans are not to be played around with, deadly bacteria develop and you will become extremely ill.
Arsenic tastes like almonds.