This is all the Support Materia found in Final Fantasy VII.

Support Materia:			Selling Price:	Buying Price:
All		-	140000 Gil	2000 Gil
Ability	AP Growth:	Supported Materia:		Purchase From:
1 Use	-----0 AP	Restore, Mystify, Heal, Time, Seal, Ice, Poison, Fire, Gravity, Lightning, Barrier, Earth, Destruction, Revive, Transform, Master Magic.		Fort Condor (discs 2 & 3)
2 Uses	-----2000 AP
3 Uses	-----10000 AP
4 Uses	-----25000 AP
5 Uses M A S T E R	-----40000 AP
Location Found:
Sector 7 Slums, Shinra HQ (63rd Floor; disc 1), Initially equipped to Red XIII, Shinra Cargo Ship, Mt. Nibel, Great Glacier.

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Support Materia:			Selling Price:	Buying Price:
Elemental		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
Half*	-----0 AP	Ice, Poison, Fire, Gravity, Lightning, Earth, Choco/Mog, Shiva, Ifrit, Ramuh, Titan, Leviathan, Alexander, Phoenix, Typoon		-
Null*	----10000 AP
Absorbed*	-----40000 AP
*(only when euipped on Armour)	-----80000 AP
Location Found:
Shinra HQ (62nd Floor), Mt. Nibel, Nibelheim - Tifa's Piano.

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Support Materia:			Selling Price:	Buying Price:
MP Absorb		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
-	-----0 AP	Restore, Revive, Ice, Poison, Fire, Gravity, Lightning, Earth, Comet, Contain, Full Cure, Ultima, Master Magic, Throw, Morph, Steal, Deathblow, Mime, Master Command, All Summon		-
M A S T E R	----100000 AP
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Location Found:
Wutai (Yuffie's Sub Quest).

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Support Materia:			Selling Price:	Buying Price:
HP Absorb		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
-	-----0 AP	Restore, Revive, Ice, Poison, Fire, Gravity, Lightning, Earth, Comet, Contain, Full Cure, Ultima, Master Magic, Throw, Morph, Steal, Deathblow, Mime, Master Command, All Summon		-
M A S T E R	----100000 AP
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Location Found:
Wutai, Northern Crater.

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Support Materia:			Selling Price:	Buying Price:
Added Cut		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
-	-----0 AP	All Magic, Steal, Sense, Deathblow, Manipulate, Morph, Throw, Mime, Master Command, All Summon		-
M A S T E R	----200000 AP
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Location Found:
Great Glacier - From the signpost entrance go Right 2 screens, take Upper Right fork, go Right 4 screens, go straight ahead to the upper right of the screen, go Left 1 more screen, the Added Cut materia is lying on the path in the snow.

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Support Materia:			Selling Price:	Buying Price:
MP Turbo		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
+10%	-----0 AP	All Magic, All Summon		-
+20%	-----1500 AP
+30%	-----6000 AP
+40%	-----18000 AP
+50% M A S T E R	-----35000 AP
Location Found:
Whirlwind Maze.

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Support Materia:			Selling Price:	Buying Price:
Steal-As-Well		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
-	-----0 AP	All Magic, Steal, Sense, Deathblow, Manipulate, Morph, Throw, Mime, All Summon		-
M A S T E R	----200000 AP
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Location Found:
Wutai Da-Chao Mountains.

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Support Materia:			Selling Price:	Buying Price:
Magic Counter		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
+30%	-----0 AP	All Magic, All Summon		-
+40%	-----40000 AP
+60%	-----80000 AP
+80%	-----160000 AP	Excluded Materia:
+100% M A S T E R	-----300000 AP	Master Magic, Master Summon
Location Found:
Northern Crater, Gold Saucer Chocobo Racing (Rank A & S).

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Support Materia:			Selling Price:	Buying Price:
Final Attack		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
1 Use	-----0 AP	All Magic, All Summon, All Command		-
2 Uses	-----20000 AP
3 Uses	-----40000 AP
4 Uses	-----80000 AP	Excluded Materia:
5 Uses M A S T E R	-----120000 AP	Slash-All, Double Cut, W-Item, W-Summon, W-Magic, Master Command
Location Found:
Win the Gold Saucer Battle Square - Special Battle.

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Support Materia:			Selling Price:	Buying Price:
Quadra Magic		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
1 Use	-----0 AP	All Magic, All Summon		-
2 Uses	-----20000 AP
3 Uses	-----80000 AP
4 Uses	-----120000 AP	Excluded Materia:
5 Uses M A S T E R	-----200000 AP	Knights of Round
Location Found:
East of Chocobo Farm, in the Materia Cave that requires blue Chocobo.

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Support Materia:			Selling Price:	Buying Price:
Sneak Attack		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
+20%	-----0 AP	All Magic, Steal, Sense, Deathblow, Manipulate, Morph, Throw, Mime, All Summon		-
+35%	-----20000 AP
+50%	-----60000 AP
+65%	-----100000 AP
+80% M A S T E R	-----150000 AP
Location Found:
Gold Saucer Chocobo Racing (Rank A & S).

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Support Materia:			Selling Price:	Buying Price:
Counter		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
+30%	-----0 AP	Steal, Sense, Deathblow, Manipulate, Morph, Throw, Mime		-
+40%	-----40000 AP
+60%	-----80000 AP
+80%	-----120000 AP
+100% M A S T E R	-----200000 AP
Location Found:
Northern Crater.

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Support Materia:			Selling Price:	Buying Price:
Added Effect		-	1 Gil	-
Ability	AP Growth:	Supported Materia:		Purchase From:
-	-----0 AP	Poison, Transform, Contain, Time, Sense, Manipulate, Throw, Master Command, All Summon		-
M A S T E R	-----100000 AP
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Location Found:
Cave of the Gi.