If you’re planning on proposing to your girlfriend, and need some advice on buying the perfect diamond engagement ring check out these interesting diamond and ring facts. 1. 40% of women say they would like their engagement ring to be a complete surprise 2. While 60% say they would like to help choose their own ring. 3. The most popular diamond shape is the round brilliant cut diamond 4. GIA is the most respected diamond grading labs in the world. Make sure the diamond you buy is GIA certificated so it’s graded accurately and you know exactly what you are buying. 5. Buying online can save you money, as high street jewellers have bigger over heads savings off diamonds and engagement ring settings can be up to 50%. 6. If you have a diamond or old stone you have inherited, sometimes getting it remodelled into a new ring design can be a romantic option. 7. An engagement ring is worn on a women’s third finger on the left hand due to ancient cultures believing the finger had a special vein called Vena Amoris – the vein of love. 8. The most common metal used is either platinum, white gold, yellow gold and sometimes even rose gold. 9. December is the most popular month of the year to get engaged. 10. The estimated average diamond carat weight used in engagement rings is 0.37 carats.