One of the most popular diamond necklace styles is a chain with a heart pendant. Diamond heart necklaces typically feature a heart outline pendant with diamonds set along the surface. However, some hearts feature a single diamond while others include both diamonds and colored gemstones. Diamond cross necklaces are also popular and are available in as many different styles as the heart necklace.

Women who want to add a bit of sparkle to an outfit but don't want anything too flashy often choose a diamond solitaire necklace. These necklaces feature a single diamond on a gold or silver chain. The most common cut for diamond solitaire necklaces is round but other cuts such as princess, oval, pear and heart-shaped are also available.

Another popular style for diamond necklaces is the tennis necklace. While these necklaces can be purchased and worn as a set with a matching tennis bracelet, they are also stunning when worn alone. Some tennis necklaces feature diamonds that become gradually smaller going toward the back of the neck. Others are patterned in the same fashion as a traditional tennis bracelet with one size of diamond encircling the entire neck.

If you are looking for a gift for a special occasion, consider a diamond necklace. Diamond heart necklaces make great birthday, anniversary or Mother's Day gifts and cross pendants are appropriate for christenings, baptisms and first communions. The variety of diamond necklaces available allows you to select a necklace as unique as the woman who will receive it.