Crown Jewel is a rich purple shimmer polish with hints of pink and a slight duochromatic effect in the right light. It looks much warmer toned in the bottle, due to the pinkish shimmer, but the base is such a royal dark blue it comes out a lot cooler toned on the nails. This is two thick-ish coats without topcoat that dried surprisingly quickly.
My guess is that IsaDora wanted to do a Taboo dupe, but didn’t quite get there. Taboo is plenty of shades warmer than Crown Jewel and has more depth to it, but that doesn’t mean that I like Crown Jewel any less. It really is a stunning shade of purple!