Here are a few ideas:
Amethyst 8XG + Rose Quartz (Superfan) = Homeworld Smoky Quartz
Homeworld Amethyst (right shoulder gem) + Rose Quartz (Hippie) = 2nd Homeworld Smoky Quartz
Blue Pearl + Rose Quartz (Shy) = Homeworld Rainbow Quartz
Homeworld Garnet (fused from Navy Ruby and Homeworld Chest Sapphire) + Rose Quartz (Hippie) = Homeworld Sunstone