Trade names can help market and sell crystals, often at a higher price. Some of them are misleading, and suggest a crystal is a different material. An example of this is African Turquoise. It’s not a Turquoise at all, but a type of (often dyed) Jasper.
Some trade names don’t mislabel the material, but make it sound nicer. Lavender Rose Quartz IS Rose Quartz. But the reason it’s a newer material on the market is because it’s actually a low grade version of this pink crystal. It wasn’t popular for that reason, until someone gave it a more flattering name.