Originally Posted by Nerithos - Sanctuary

It's 4. (10char)

Originally Posted by andracil

The following weapons glow:
-Three-star (purple name) : Blue glow. Obtained at lvl 20 from a quest, or rarely from weapon manufacturing.
-Legendary (gold name) : Gold glow. Obtained by using materials and a mold (dropped from dungeon bosses) at a Legendary weapon forge in Archosaur.
-Twilight (green name) : Green glow. Obtained by using Twilight Temple materials at a Twilight Weapon forge in Archosaur.

Also, you can make armor glow by adding soulgems, here's a list:
2 grade 5 hp stones = purple glow
2 grade 5 phys def stones = orange/reddish glow
2 grade 5 mag def stones = white glow
2 grade 5 mp stones = blue glow
2 grade 5 evasion stones = yellow glow
2 grade 5 elemental stones = green glow
2 grade 5 stones, not the same = sparkles
4 grade 8 hp stones = lightning effect
4 grade 8 mp stones = blue crystal effect
4 grade 8 elemental stones = Strong green glow with sparkles
4 grade 8 phys def stones = Burning fire
4 grade 8 mag def stones = Strong white mist
4 grade 8 evasion stones = Bigger/stronger yellow glow with sparkles.

Originally Posted by Vixe - Heavens Tear

Actually, it's not Immaculate. If you looked up the grade 8 shards from the jewelcraftsman, it's the Perfect shard that creates the effects. And yes, you need 4 of the perfect shards in order to get this effect.