what do sparkles of gold mean?

I keep seeing glittery, almost like sparks of fire, that are gold, and i'm not sure what they are, energies, my aura, or a spirits aura, they are usually in front of me, or beside me, not even a foot away. I can't even tell what brings them on, the last time it happened, i was involved in a kundalini sensual moment, but sometimes they just happen randomly, most times it happens when i am aware of my spirit guides around me. They are very vivid and clear, and they only last for a few seconds. I can only see auras if i concentrate, but these are very vivid sparks. I also only can see my hand auras because i don't really have any white walls in my house to examine it, so i just use my ceiling, and my hand auras usually appear to be a very pretty light green, (not gold) sometimes it extends into odd rainbow colours, like actual miniature rainbows, not sure what that means, but i'm also not really good at seeing auras.

I also saw gold a few times, light up the darkness of my eyes when they were closed, but i don't think they are related.

What could they be? And what does gold stand for?