資料參考

http://www.gia.edu/

http://hk.bluenile.com

http://www.chowtaifook.com

http://www.lukfook.com.hk/

http://www.77diamonds.com

http://www.brilliance.com/

http://www.myjewelry.com.hk/

http://www.diamondcheers.com/

http://www.diamond.org.hk/

http://www.i-diamond.hk

http://www.ciel.com.hk/

http://mfjewel.com.hk/

http://www.eternitediamond.com/

http://maia.com.hk

http://romanticstarint.com/