Will this melt in the sun?

Inside the sun, yes. In the sun on earth, no. If your are looking for something non toxic that melts below 90F, you want gallium (melting point 85.6F)

What's the purity of the metal?

The cube is 95% tungsten with nickel-iron for the remainder.

Why does the description say this only weighs 4.8 oz?

Hello, this item weighs 0.66lbs. We are unable to edit that shipping weight field, Amazon has entered it in error.

what is the measurement tolerance of the cube?

The cube is +/- 0.002" on all dimensions.

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Description

💼 Elevate Your Desk Game with a Touch of Tungsten!

BONUS KNOWLEDGE - Comes with a FREE certificate of conformance and an intriguing fact sheet to impress your peers.
UNMATCHED DENSITY - Experience the weight of innovation with a 19.3 g/cm³ density that makes this cube a conversation starter.
SAFE AND USER FRIENDLY - Rounded edges ensure non-toxic handling, making it perfect for classrooms or your professional workspace.
VERSATILE EDC COMPANION - Ideal for teachers, office desks, or as an everyday carry item that showcases your unique style.
AEROSPACE GRADE MATERIAL - Crafted from the same tungsten used in rocket ships and race cars, this cube embodies strength and durability.

The Tungsten Cube - 1" is a dense, aerospace-grade tungsten alloy cube designed for safe handling and versatile use. With rounded edges and a weighty presence, it serves as an ideal accessory for professionals, educators, and everyday carry enthusiasts. Each cube includes a certificate of conformance and a fact sheet, making it not just a product, but a statement piece.