Diamania provides damonds and you can get  diamond price from here - Diamania鑽戒.

We have numerous styles designed and manufactured in Japan. Pictures shown below are only part of our products for reference.
Price is listed based on 18K gold (including the cost of side stones but not the centre stone).
Most of the styles can be made of platinum, please contact us for corresponding quotation.
N1895Q
Weight of side stones: N/A
Price:HK$1200
N2308QR
Weight of side stones: N/A
Price:HK$1300
N2366Q
Weight of side stones: N/A
Price:HK$1600
N2369DQ
Weight of side stones: 0.06carat
Price:HK$1600
N3098Q
Weight of side stones: 0.10carat
Price:HK$1800
N4381VQ
Weight of side stones: 0.30carat
Price:HK$3800
N4386VQ
Weight of side stones: 0.13carat
Price:HK$2500
N4593VQ
Weight of side stones: 0.27carat
Price:HK$3800
N4721Q
Weight of side stones: N/A
Price:HK$1000
N4750VQ
Weight of side stones: 0.12carat
Price:HK$2300
N4800Q
Weight of side stones: N/A
Price:HK$1300
P0375N
Weight of side stones: 0.04carat
Price:HK$1500
P0428N
Weight of side stones: N/A
Price:HK$1000

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