A sweet spot in the compromise between size and price, diamonds around the 0.70-ct mark make great engagement ring stones. A diamond budget of about $2,000 can get you a fine diamond at this weight.

All over the world, India is deemed to be the region where diamonds are found at cheaper rates. This certainly has many other reasons as well.

The industry had been one of the great winners of the global pandemic, as stuck-at-home shoppers turned to diamond jewelery and other luxury purchases. But as economies opened up, demand quickly cooled, leaving many in the trade holding too much stock that they'd bought for too much money.

so, depending on your buying range. but India is the cheapest followed up by China, Dubai, Thailand, and Belgium. they are the cheapest because most of the world's diamonds are cut there. so you do not have to pay any markup due to shopping or retailer markup.