Everyone knows that gems are measured in “carats”, och 1 gram is equivalent to 5 carats (ct). En 1 carat round brilliant diamond with a diameter of approximately 6.3 till 6.5 mm. I allmänhet, the price of gemstones is calculated in carats. Till exempel, if a ruby weighs 5 carats, the total price is 55,000 RMB. […]
