From the RuneScape Wiki, the wiki for all things RuneScape

A Bracelet is a type of equipment item in RuneScape worn in the Hand slot of the equipped inventory menu. Bracelets are the third item type players can make with a gem with the skill Crafting. However, they are members only. To enchant a bracelet with gem on it, you need runes to cast the appropriate enchant spell. Bracelets can be created using a bracelet mould, a gold bar and a gem at a furnace. Also in the equipped inventory menu it appears in the right hand but when equipped it appears in the left hand.

Gem	Enchanted	Picture	Crafting Level	Crafting XP	Magic Level	Magic XP	Enchantment Effect
None	N/A		7	25	N/A	N/A	Cannot be enchanted
Sapphire	Bracelet of clay		23	60	7	17.5	Mines Soft clay instead of normal clay, disintegrates after 28 uses.
Emerald	Castlewars bracelet		30	65	27	37	20% more damage to opposing side in Castle Wars, and bandages are 50% more effective, breaks after 3 uses.
Ruby	Inoculation brace		42	80	49	59	Protects user from disease damage, breaks after protection has been used up.
Diamond	Forinthry bracelet		58	95	57	67	Prevents wearer from being skulled when entering The Abyss, and negates teleblocks casted by revenants. Players still suffer from Prayer drain when they enter The Abyss. This bracelet disintegrates after 5 uses.
Dragonstone	Combat bracelet		74	110	68	78	Teleports to Warriors' Guild, Champions' Guild, Ranging Guild and the Monastery, must be recharged at the Legends' Guild after charges are used. Also provides updates on enemies remaining to complete slayer tasks every 10 kills.
Onyx	Bracelet of regeneration		88	125	87	97	Doubles natural hitpoint regeneration rate.

Wikipedia has an article about:

Bracelet

From SWG Wiki

Bracelet is a type of jewelry worn on the wrist. One bracelet can be worn on each wrist.

Bracelet appearances

• Bangles
• Golden Bracelet
• Golden Symbol
• Metal Band
• Metal Bracelet

Bracelets

• An Ornate Braclet
• Surveyor's Bracelet

Right wrist

• Bracelet of Inspirated Status (right)
• Jedi Knight Meditation Bracelet (right)
• Jedi Knight's Wristguard (right)
• Jedi's Wristguard (right)