Well I kinda was bored and felt like figuring out all the blocks a beacon can go through and I got a complete list

• Daylight sensor
• Bed
• Sign
• end rod
• cobweb
• Trapped chest
• Chest
• Wooden trapdoor
• Iron trapdoor
• Hopper
• all the fence gates
• all the Doors
• Sticky Piston
• Piston
• Snow Slab
• All the leaves
• Enchantment table
• Ice
• EnderChest
• Chorus flower
• Chorus Plant
• all the anvils
• All The Glass Panes
• Ironbars
• Slime Block
• All The Heads
• All The Carpets
• Cobble Wall
• Mossy Cobble Wall
• All The Glass Blocks
• Cactus
• All The Fences
• All The Banners
• Ladder
• End GateWay
• End Portal
• Nether Portal
• End Portal Frame
• BedRock
• Lever
• Torch
• Flower pot
• Both Buttons
• All The Pressure Plates
• Redstone Repeater
• Redstone
• Redstone Torch
• All The Rails
• All The Flowers
• All The Tall Grass
• Air
• Barrier
• Water
• Lava
• Trip Wire Hook
• Trip Wire
• Cauldron
• Brewing Stand
• warning these might not work on future versions this is updated to 1.9.2