These are literally microchips. Tens of thousands of dollars of value in each gram.
Shipping cost is fundamentally irrelevant, you can put $100MM worth on a direct flight and have room left over for your family and friends.
Shipping cost is fundamentally irrelevant, you can put $100MM worth on a direct flight and have room left over for your family and friends.
^certainly there's activity in that space
A 300mm wafer at 0.775mm thickness that weighs that much would be a density of 15g/cm³: midway between lead (11) and gold (19). Silicon is only 2.3g/cm³.
A 300mm wafer should be much closer to 100g than 1kg. Another page (on the same website!) says 125g, which is pretty dead-on 2.3g/cm³.
However, low-end processors will be worth radically less ($100 CPUs aren't 10x smaller) and things like top-end FPGAs will be worth substantially more. An Agilex 7 can be $40,000 and if it's got less then 4 grams (around 1700mm², or 41mm*41mm), the wafer is worth over $10k/gram. The entire chip is 56x56, and from the package drawing, the die appears to be around 30x30, so it exceeds the threshold.
This is assuming all the value of the retail price is the main wafer, which is also not true.
Thousands per gram, certainly seems possible, though I doubt it's even that on average across all chips, and considering that there is non-wafer content in the price. Tens of thousands is probably pushing it. However, it's certainly likely to be rather more than gold in terms of specific value ($100/g, ish). Harder to fence, though.