Amazon announced yesterday that its retail diamond sales grew over 100% in the first quarter of 2008, following a so-so quarter by Blue Nile and a strong indicator that Amazon is gaining significant share in this category. Valuable to read to get an update on the top sellers:

Everything from pendants to stud earrings (in all sizes) to diamond chronograph watches were extremely popular with Amazon customers in the first quarter. Among the top-selling styles were a 14k white gold journey curve pendant, an assortment of princess-cut diamond solitaire rings and 1-carat round-cut diamond stud earrings. Black diamond pendants and diamond-accented watches also did very well.

Amazon added over 450 new diamond jewelry styles in the first quarter alone. One of the leading top sellers was the black diamond infinity pendant. Top-selling diamond watches included the Movado Diamond Amorosa watch, the Seiko Coutura watch and the Invicta Limited Edition Diamond chronograph watch.

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