I notice that the price seems to be almost a linear function of the surface area rather than the mass. Is the because of the difficulty in finishing?

Probably the surface are has something to do with their pricing, but I am glad the mass is not used, otherwise I would be paying over $600 for 2" cube instead of their asking price of approximately $300 (compared to their 1" cube). Tungsten is quite hard (about 7 in the Moh's hardness scale), but very hard to melt, because of its high melting point, despite they alloyed their tungsten with 5% of iron and nickel. I would say tungsten is relatively difficult to shape, but polishing would not be hard. They just use harder material as abrasives.

Is the cube made of pure Tungsten? (i.e. 99.95% Tungsten)

High purity. They add a little bit of copper and iron to it to make it stronger but not brittle because pure tungsten is very brittle. You'll love it - it's every bit the money. Extremely dense.

Under the details this says aluminum, are both the 2” and the 1” cubes tungsten?

When I purchased the 2" tungsten cube, it came with a 1" cube which was also made of tungsten.

Yes, it is a solid metal cube that weighs 5.2 lb., which is heavy for its size. If a piece of steel of this same size 2"x2"x2" it would only weigh about 2.3 lb.

Educational Objective(s)	Memory Skill, Creative Thinking, Color Recognition
Model Number	893
Number of Puzzle Pieces	1, 2
Batteries Required	No
Batteries Included	No
Material Type(s)	Plastic
Colour	silver
Product Dimensions	5.08 x 5.08 x 5.08 cm; 2.36 kg
Item model number	893
Manufacturer recommended age	14 years and up
Manufacturer	Midwest Tungsten Service
Item Weight	2 kg 360 g

Midwest Tungsten Service Tungsten 2 Cube Block Weight | Limited TIME Offer: Free 1 Cube with Purchase of 2 Tungsten Cube

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