Gem beast
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Gem beasts are an unique set of Slayer monsters available in August. Starting at level 80 Slayer, players can begin killing Sapphire Beasts.
Gem beasts are popular for mid-level players due to their armour and weapon sets. Nearly all gem beasts can be easily dispatched by using Protect from Melee to negate all incoming damage, with the exception being Dragonstone Drakes.
Sapphire Beast
Starting at level 80 Slayer, players can receive Sapphire Beast tasks from Nixite.
Armour
Comprised of the Sapphire helm, Sapphire body, and Sapphire legs, the Sapphire armour set requires level 80 Defence to wear. Sapphire armour, although weaker in individual stats to other Tier 80 armours, provides a tribrid attack benefit to all combat styles, giving it the tradeoff of being useful when multiple combat styles are utilized.
- Gem armours do not require charges.
Weapons
Comprised of the Sapphire halberd, Sapphire longbow, Sapphire shortbow, Sapphire staff, and Sapphire warhammer, the Sapphire weapons require level 80 in their respective styles.
- Sapphire weapons must be charged with Sapphire shards to be used, at a rate of 25 charges per 1 shard.
- Tip: Utilizing the Charged Preservation Talent will reduce your chance of consuming a charge.
Gem Armor 
Requiring 80/85/90/95/100 Defense respectively, Gem armor is a 'Tribrid' style armor, meaning it provides attack bonuses for all 3 styles of the Combat Triangle. Because of this, Gem armor has lower attack and defense bonuses across the board versus style-specific armors.
Gem Weaponry 
Requiring 80/85/90/95/100 in their respective combat style, Gem weapons must be charged with 'Gem Shards' in order to be used. By default, weapons gain 25/24/23/22/21/20 charges per shard, respectively.
Sapphire Beast
Requiring Level 80 Slayer to be assigned, Sapphire Beasts are the first entry in the Gem Beast family. Sapphire beasts will primarily drop Sapphire Shards, an item used in the creation of Sapphire armor, weapons, and as charges for said weapons.
For a comprehensive drop table, see Sapphire Beasts
Emerald Beast
Requiring Level 85 Slayer to be assigned, Emerald Beasts are the second entry in the Gem Beast family. Emerald beasts will primarily drop Emerald Shards, an item used in the creation of Emerald armor, weapons, and as charges for said weapons.
For a comprehensive drop table, see Emerald Beasts
Ruby Beast
Requiring Level 90 Slayer to be assigned, Ruby Beasts are the third entry in the Gem Beast family. Ruby beasts will primarily drop Ruby Shards, an item used in the creation of Ruby armor, weapons, and as charges for said weapons.
For a comprehensive drop table, see Ruby Beasts
Diamond Beast
Requiring Level 95 Slayer to be assigned, Diamond Beasts are the fourth entry in the Gem Beast family. Diamond beasts will primarily drop Diamond Shards, an item used in the creation of Diamond armor, weapons, and as charges for said weapons.
For a comprehensive drop table, see Diamond Beasts
Dragonstone Drake
Requiring Level 100 Slayer to be assigned, Dragonstone Drakes are the fifth entry in the Gem Beast family. Dragonstone Drakes will primarily drop Dragonstone Shards, an item used in the creation of Dragonstone armor, weapons, and as charges for said weapons.
For a comprehensive drop table, see Dragonstone Drakes