SEGA always does this. There is a perfect SEGA answer to something and they go generic. See the All-Stars Racing weapons as an example. Could have had it be SEGA Heroes: Columns or something
To be fair, looking into it. In Columns while the yellow, green and blue gems each had unique cuts, they were all square shaped. Maybe the initial idea was for Columns gems to be in the puzzle game but wanted the shapes to be more recognisable.
Now THIS is a mobile game that looks terrible.
Actually I saw some gameplay on YouTube and it doesn't seem that half bad.
Granted it looks like it recycled Bejeweled or Candy Crush but whats interesting is that it doubles as a turn-based combat RPG. Only turns and attacks are decided by the colours you matched.
For example, match 3 blue gems and the Sega character in the blue position will attack.
As much as it's blatantly Bejeweled, it's done in a way that's somewhat fresh and original. And gets some milage with different fighters and characters to unlock for the RPG.
Would be nice if there was a healing mechanic though.