Lucid

Lucid is a material type available in  and Kingdom Hearts II. Lucid materials contain the essence of emptiness and are associated with Gravity and Aero magic.

Design
Lucid materials have an Elemental material structure and are clear.

The word "lucid" means "clear" or "transparent", hence their transparency. This is also reflective of the "essence of emptiness" that the materials contain.

Kingdom Hearts

 * Lucid Shard: Shadow (6%), White Mushroom (100%), Bambi (40%/60%)
 * Lucid Gem: Gargoyle (4%), Wight Knight (4%), White Mushroom (10%/40%), Bambi (30%/40%/60%)
 * Lucid Crystal: Darkball (1%), Bambi (30%)

In Kingdom Hearts Final Mix, Lucid Shards are also dropped by the Gigas Shadow.

Kingdom Hearts II

 * Lucid Shard: Rabid Dog (6%), Trick Ghost (10%)
 * Lucid Stone: Graveyard (12%), Toy Soldier (12%), Wight Knight (8%)
 * Lucid Gem: Bookmaster (10%), Magnum Loader (8%)
 * Lucid Crystal: Neoshadow (8%)

Kingdom Hearts II Final Mix

 * Lucid Shard: Chest at the Secret Passage; chest at the Underworld Caverns: Entrance.
 * Lucid Stone: Chest at the Underworld Caverns: Atrium.
 * Lucid Gem: Chest at the Wildebeest Valley.

Kingdom Hearts III
Lucid Crystals can be synthesized once 32 different synthesis materials are obtained.
 * 1 Wellspring Crystal
 * 2 Lucid Gem
 * 3 Lucid Stone
 * 5 Lucid Shard

Kingdom Hearts
Lucid materials are used to synthesize the following items:
 * Dark Ring (2 Lucid Shard)
 * Golem Chain (1 Lucid Gem)
 * Master Earring (3 Lucid Shard, 2 Lucid Gem)
 * Defense Up (5 Lucid Shard, 3 Lucid Gem, 1 Lucid Crystal)
 * Crystal Crown (3 Lucid Crystal)
 * Ultima Weapon (5 Lucid Gem)

Kingdom Hearts Final Mix
Lucid materials are used to synthesize the following items:
 * Cottage (1 Lucid Shard)
 * Power Chain (1 Lucid Shard)
 * Dark Ring (2 Lucid Gem)
 * Gaia Bangle (5 Lucid Shard, 3 Lucid Gem)
 * Defense Up (3 Lucid Shard)
 * Heartguard (3 Lucid Gem, 1 Lucid Crystal)
 * Crystal Crown (5 Lucid Crystal)
 * Dark Matter (9 Lucid Shard)
 * Megalixir (5 Lucid Gem, 3 Lucid Crystal)

Kingdom Hearts II
Lucid materials are used to synthesize the following items:
 * Mega-Potion (1 Lucid Shard)
 * Mega-Ether (1 Lucid Shard)
 * Defense Boost (3 Lucid Crystal)
 * Power Boost (3 Lucid Crystal)
 * Midnight Anklet (1 Lucid Stone, 1 Lucid Shard)
 * Chaos Anklet (1 Lucid Stone, 1 Lucid Shard)
 * Power Band (1 Lucid Stone)
 * Buster Band (1 Lucid Stone)
 * Soldier Earring (1 Lucid Gem)
 * Fencer Earring (1 Lucid Gem)

Kingdom Hearts III
Lucid materials are used to synthesize the following items:
 * Mega-Potion (3 Lucid Shard)
 * Refocuser (3 Lucid Shard)
 * Hi-Refocuser (3 Lucid Stone)
 * Defense Boost (2 Lucid Crystal)
 * Ultima Weapon (2 Lucid Crystal)
 * Save the Queen (1 Lucid Crystal)
 * Save the Queen+ (1 Lucid Crystal)
 * Clockwork Shield+ (1 Lucid Gem)
 * Wind Fan (2 Lucid Stone, 5 Lucid Shard)
 * Ability Ring+ (6 Lucid Shard)
 * Technician's Ring+ (6 Lucid Stone)
 * Skill Ring+ (6 Lucid Gem)
 * Cosmic Ring (3 Lucid Gem)
 * Lucid Crystal (2 Lucid Gem, 3 Lucid Stone, 5 Lucid Shard)

Notes and references
Hyalin Luzid