Pink diamonds are usually mined from the Argyle mine in Australia. However, natural pink diamonds are very rare, and hence, are the most expensive of all the fancy colored diamonds. Though some pink diamonds are naturally seen in colorless form, they are subjected to irradiation, pressure, and heat to obtain the pink color. If you are planning to buy an engagement ring with pink diamonds, you need to primarily consider the color intensity and size of the stones that determine how expensive the stone would be. If you cannot afford the high price of the diamond, you can consider buying a synthetic pink diamond engagement ring. These are created manually in a laboratory setting and treated in order to get a similar chemical structure as that of a natural pink diamond. When you buy a pink diamond engagement ring, check the GIA grading to know about the 4 C’s of the diamond. In addition, you should make sure to get the certificates that mention whether your engagement ring with pink diamonds is natural or synthetic.