Why the item is so expensive given the market price of tungsten is less 30USD/kg?

There are multiple refining, purifying, manufacturing, and machining steps that occur between what is essentially a rock to a finished product with smooth surfaces and rounded edges. Tungsten is not refined by smelting or in a manner similar to many other metals due to the fact that it has the highest melting point of any metal. Tungsten is, therefore, extracted chemically from the crushed ore in a series of chemical reactions, titrations, washings, and filterings. The end result of the refining process is high purity tungsten powder. To consolidate tungsten powder it may be blended with a binder and very small amounts of other materials that will provide desired properties to the finished product. The most common method of consolidation is sintering. Tungsten powder is pressed into cakes or fragile bars which are heated in a furnace until the particles adhere to one another. The bar is then placed in a sintering bottle for further heating. Electric current is run through the bars until they become extremely hot, and the individual tungsten grains merge together and form a solid part. During this process the bar shrinks and becomes more dense. Alloys do not require millwork to enhance properties in the same way that pure tungsten does, but may be worked anyway to achieve desired shape. These heavy metal alloys are quite useful for many purposes and are machined much more easily than pure tungsten. Each of these steps adds cost to the final product. A broad range of prices for finished tungsten products would be from $25 to $2500 per kilo, with the majority of products in the $100 to $350 per kilo range.

Deciding btw 1" & 1.5" tungsten cube. site says 1" weighs .66 lb and 1.5" weighs 2.2 lb. (1kg). is that right? i can't make the math work. help?

1" cube = 1"×1"×1" which is 1inch³. 1.5" cube = 1.5"×1.5"×1.5" which is 3.375inches³. Therefore it is 3.375 times the mass of the smaller cube.

What is the chemical composition of the cube? How much tungsten ie 90%, 95%, 100%?

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

Will this cube ever oxidize or corrode in any way?

my cube has stayed pristine for over a year. I just wipe fingerprints off off it with lens cleaner cloth. My wife thinks i am an idiot for liking it - but that probably makes me like it even more.

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Midwest Tungsten Service 1.5" Cube Weight One Kilo Block

Midwest Tungsten Service 1.5" Cube Weight One Kilo Block

Product ID: 421706283

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Details

Brand
Midwest
Puzzle type
Puzzle Box
Manufacturer Minimum Age (MONTHS)
72
Number of pieces
1
Product dimensions
38L x 38W

📏Compact 1.5-inch cube size

⚖️1 kg dense tungsten weight

🛡️Rounded edges for safe handling

Description

⚡ Hold the weight of wonder in your palm!

SAFE STYLISH - Rounded edges combine safety with a modern design, making it ideal for your office or home display.
CONVERSATION STARTER - As admired by Adam Savage and featured on top science and geek culture platforms, it’s a must-have desk icon.
CERTIFIED AUTHENTICITY - Comes with a chemical composition certificate and fascinating tungsten facts—perfect for the curious mind.
POCKET SIZED POWERHOUSE - Experience the surprising heft of 1 kg in a sleek 1.5-inch cube—density you can feel.
AEROSPACE GRADE CRAFTSMANSHIP - Made from premium tungsten alloy, ensuring unmatched durability and a futuristic aesthetic.

This 1.5-inch cube is a 1 kg block of aerospace-grade tungsten alloy, renowned for its extreme density and durability. Rounded edges ensure safe handling, and it includes a certificate of chemical composition along with intriguing tungsten facts. Celebrated by science enthusiasts and pop culture icons alike, it’s a unique, compact collectible that elevates any professional workspace or home display.

Specifications

Product Dimensions	3.81 x 3.8 x 0.1 cm; 1 kg
Manufacturer recommended age	6 years and up
Item model number	893
Educational Objective(s)	Understanding Density and Materials Science; Mathematics Concepts
Number of Game Players	1pc
Number of Puzzle Pieces	1
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
Material Type(s)	Tungsten
Color	Silver
ASIN	B00XZBIJLS

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