Semi-precious blue gem

Semi-precious blue gem was removed after an update.

As the contents of this page no longer exist in Old School RuneScape, this article is preserved for historical purposes.

A semi-precious blue gem is an item obtained during the 2018 Birthday event by using a rod with net on the fishing spot directly south of the White Knights' Castle. It is to be given to Herquin so that he can create a polished blue gem.

v • d • e 2018 Birthday event
Characters	Da Vinci • Aggie • Herquin • Dunce • Gnome child • Wise Old Man • Evil Dave • Cow31337Killer • Tim • Crunchy • Art • Dave • Gene
Items	Prop sword • Silver dust • Gold dust • Silver paint • Gold paint • Rod with net • Semi-precious blue gem • Polished blue gem
Rewards	Prop sword • Birthday present

v • d • e Gems
Semiprecious stones	Pearl ^(Pearls) • Opal ^(Uncut) • Jade ^(Uncut) • Red topaz ^(Uncut) • Amethyst
Precious stones	Sapphire ^(Uncut) • Emerald ^(Uncut) • Ruby ^(Uncut) • Diamond ^(Uncut) • Dragonstone ^(Uncut) • Onyx ^(Uncut) • Zenyte ^(Uncut) ^(Shard)
Quest-related gems	Blood diamond • Ice diamond • Smoke diamond • Shadow diamond • Black prism • Charged onyx • Deconstructed onyx
Others	Carved gem • Enchanted gem • Eternal gem • Mystic jewel • Polished blue gem ^(Unpolished)