Rag's Shop

Rag's Shop is a shop that appears in Home III, Shinjuku Babel, and Chinatown. It's the location with a gemstone on your map.
This store will allow you to turn in gems for mitama, elementals, and for skills. Prices are the same for Home III and Shinjuku Babel, but Chinatown's gives a 20% discount. I'll be listing the prices for the first two shops.

Mitama
You need one free space in your comp for each Mitama you buy.
Aramitama - Coral/Sapphire - 10 each
Nigimitama - Jade/Turquoise - 10 each
Kushimitama - Amethyst/Pearl - 10 each
Sakimitama - Garnet/Peridot - 10 each

Elementals
You need one free space in your comp for each Elemental you buy. These are not accomplished elementals.
Flamies - Ruby - 10
Aquans - Aquamarine - 10
Aeros - Emerald - 10
Erthys - Topaz - 10

Skills
Skills can only be placed on an elemental you have summoned. Accomplished elementals can be used. You will need all gems listed.
Maragidyne - 20 Garnet, 20 Coral, 20 Diamond, 20 Ruby, 20 Topaz
Mabufudyne - 20 Amethyst, 20 Aquamarine, 20 Diamond, 20 Sapphire, 20 Turquoise
Maziodyne - 20 Diamond, 20 Jade, 20 Pearl, 20 Sapphire, 20 Opal
Mazandyne - 20 Diamond, 20 Emerald, 20 Jade, 20 Ruby, 20 Peridot
Corona Cannon - 200 Coral
Blizzard Cannon - 200 Sapphire
Lightning Cannon - 200 Opal
Hurricane Cannon - 200 Coral
Megido - 10 Amethyst, 10 Diamond, 10 Jade
Megidora - 50 Garnet, 50 Diamond, 50 Peridot
Diarahan - 10 Aquamarine, 10 Pearl
Mediarahan - 150 Sapphire, 150 Opal
Samerecarm - 10 Peridot, 10 Topaz
Null Fire - 75 Garnet, 75 Turquoise
Null Ice - 75 Amethyst, 75 Topaz
Null Electric - 75 Aquamarine, 75 Opal
Null Force - 75 Coral, 75 Sapphire
Null Expel - 75 Diamond, 75 Peridot
Null Death - 75 Emerald, 75 Ruby
Fire Booster - 120 Coral, 60 Emerald
Ice Booster - 15 Garnet, 15 Amethyst, 170 Sapphire
Electric Booster - 45 Aquamarine, 150 Diamond, 5 Opal
Force Booster - 50 Garnet, 50 Amethyst, 50 Pearl, 50 Peridot
Cls-rg Booster - 200 Sapphire
Lng-rg Booster - 200 Diamond