Here's the Ranking Chart for Treasure Cove
*Point Requirements*
Trainee = NA
1 Star = 100
2 Star = 1,000
3 Star = 7,000
4 Star = 14,000
5 Star = 50,000
6 Star = 88,000
Champion = 200,000 (Required to win the game)
As each Era has different Gemstone Totals
5 Each = Grotto 1
10 Each = Grotto 2
15 Each = Grotto 3
Purple Gem = Multiplier (2x, 3x, 4x)
Possible Maximum Gem Values
Trainee to 1-Star = 10, 30, 60, 60 to 180 (Shark City) Gems
2-3 Star = 15, 45, 90, 120, 360 (Sea Salmon Cave) or 1,080 (Shark City) Gems
4-5 Star = 20, 60, 120, 240 (Seastar Circus), 340, 1,360 (Sea Salmon Cave), 5,440 (Shark City) Gems
6 Star = 25, 75, 150, 375 (Starstar Circus), 500, 2,500 (Salmon Cave), 12,500 (Shark City)
NOTE: For 6-Star Multiplier Gems in Shark City, you better have a good number of Flashlight Energy and Oxygen in your Air Tank before attempting a 12,500 Point Clearance
The Multiplier Gem is normally found in a Sea Salmon Cave within Grotto 3 and/or Sharks Lair
= Sea Salmon Cave on Rank 3
= Seastar Circus on Rank 4
The Respawning Goobies from the Goobie Holes and Sea Salmon Caves appear on later Skill Levels as the game gets harder
After completing Treasure Cove Deluxe, how I measured up in that game was a Final Score of 204,920 Points which is Equal to an Accuracy Rating of 102.46 out of 100 being an S Rank

Next up is the Treausre Cove Updated Version being 2.0