The price of lab diamonds has been steadily falling almost since their introduction. I believe you can now get stones for about USD$300 per carat and sometimes less. Though the price of gold has been stratospheric, so it may make up for those lower prices.

This tennis bracelet from Vrai features 6.6 carats of round stones of varying sizes, for USD$6,500. Should your budget be smaller or you prefer a daintier look, a 1.7 carat version is $2,500. They both use a 14k yellow gold setting. The larger carat weight is shown below.