The Gemini is the 8520.
The 8530 is the Aries.
However, carriers usually refer to them by easy names. Its like a Curve, therefore its the Curve 2. Despite the 8900 being called a Curve most carriers call it a Javelin.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."