The 4c of Diamonds
Diamond Colour The GIA (gemological institute of America) has 2 types of colour grading scales, the D-to-Z Colour Grading and Coloured Diamond Colour Grading. The D-to-Z Colour Grading is based on the lack of colour by comparing a stone under controlled lighting.while the Coloured Diamond Colour Grading is based on the presence of colour.if…