German model carmaker Robert Wilhelm Gulpen, who has been creating luxury car models from solid precious metals such as gold, silver and platinum for the past 12 years, announced plans to manufacture the world's most expensive and most precious model car to make it to the Guinness Book of Records. Gulpen's planned Lamborghini Aventador LP 700-4 supersports car is a unique creation made according to the personal requests of the potential buyer. “Essentially the model is made of solid gold and platinum. And it is not a model car. It is a piece of art,” Gulpen said Saturday in a press release. For Gulpen, the car model name indicates the number of jewels on the front seats to be used: Aventador LP 700-4, that means 700 pieces of precious stones per seat, or 1400 just for the two seats. It is the customer who will decide exactly what the most expensive and most precious model car in the world will look like. The customer names his preferences and instructs the type of materials that should be used, he added. Gulpen's replicas cover the range of all leading car manufacturers and are accessible to anyone with a taste for luxury and a love of cars.