A carat is a weight factor for diamonds and gemstones. One carat is divided into 100 points, so a 50-point diamond is a half-carat stone.
When measuring the purity of gold, the term 'karat' is used in North America, leaving 'carat' to be used only when describing the weight of gemstones. One gold karat is 1/24 purity by mass, so a 24-karat gold ring would be 99.9% pure gold, an18-karat gold necklace would be 75% pure gold, and so on.
Yes. However, since gemstone colours occur naturally, we may not be able to find enough gemstones that are exactly identical in colour for the whole set, especially if the stones required are of different shapes or sizes. That said, we will try our best to match the colours.
Generally, the question of scratch resistance does not pertain to metals. Scratches on brilliant finishes tends to be more visible than on matte finishes. Refinishing can remove light scratches, and this is a service we provide for a fee. Please contact us for a quotation.