Topaz

Topaz sits near the bottom of the ladder: a Basic aura at 1 in 150 that arrived in Era 6, made by ep1k_sol. With no luck boost you would expect about 150 rolls, and with a 10x potion roughly 15, so it is more of a milestone than a chase. It is also not tied to any biome or event, which means nothing about the weather changes how often it appears.

The look is quiet. According to the Sol's RNG Wiki, a vertical bronze ring circles the player, similar to the one on Rare but fainter, small bronze particles drift upward like the ones on Crystallized, and a brown-gold glow wraps the character. The in-game line simply calls it a gem of a brown hue.

The wiki notes that Topaz is the most common of the auras named after gemstones, and that many players see it as filler because it has such a simple design. It was added to the game on April 5th, 2024. If you collect gem-named auras, this is the cheap one to pick up early before you spend luck on rarer relatives.