I noticed a lot of gold when it came to Loki and Thor like when Loki gets shot at there are gold sparks and when Loki stabbed Thor with Gungnir Thor had gold sparks on him, why is this?

1. They are gods.

2. Golden Apples.

3.  All the gold you see that ping off Thor and Loki is Ichor – is the ethereal golden fluid that is the blood of the gods and/or immortals