Supercars are very common on the wide, state-of-the-art highways of Dubai. But a new record-breaking Lamborghini, made out of gold and gems, is sure to turn heads.

Carved out of a 500-kilogram block of solid gold, the finished model contains 25 kilograms of the precious metal. Starting price for the eventual auction is set at $7.5 million, of which $650,000 will go to charity, according to the manufacturer's website.

Precious metals and gemstones on the car are valued by the seller at $2.64 million. The custom model of the Lamborghini Aventador LP-700-4, crafted at a scale of 1:8 by RGE Robert Gulpen Engineering in Germany, is making its first appearance outside of Europe.

(Read more: Dubai police adds $1.4 million supercar to its fleet)

Labeled as the world's most expensive model car in the world, it's missing most of the motoring specifications car enthusiasts appreciate it for. The full-sized car is a beast under the hood, with a V12 engine producing 700 bhp that will take you from 0-100 km/h in 2.9 seconds. Automotive journalists have been especially intrigued by its fighter-jet resembling design contours, which has led to one-on-one showdown on various airfields.

Another caveat is that the model has not actually been made yet (to allow for individual customers preferences). The one on display, in line with the rather lax security around the Dubai showroom in a visit on Tuesday morning, is a prototype.