
1. Tanzanite
Average Price Per Carat: $600-$1000 USD
Tanzanite is found in just one place on Earth, at the foot of Mount Kilimanjaro in Tanzania. Also called Zoisite, this mineral is reddish-brown in its raw state, but it's often heat-treated to turn the stone sapphire blue, amethyst or violet. Often paired with white diamonds, tanzanite is perfect for eye-catching engagement rings.

3. Sapphire
Average Price Per Carat: $1,200-$2,000 USD
Mined in many countries scattered worldwide, sapphires are made from corundum, a form of aluminium oxide. Sapphires are the second most popular engagement ring stone after diamonds, and although we usually think of them being blue, they also come in stunning yellow, green, orange, pink and black.

5. Ruby
Average Price Per Carat: $4,500 USD
The word 'ruby' comes from the Latin 'ruber', which means red, and they often chosen crown jewels. Perhaps this is because royals believed them to inspire love and protect against injuries in battle. Until the 1980s, most stones came from Australia, but they are now mined in many countries across Asia, Africa and Europe.
6. Musgravite
Average Price Per Carat: $6,000 USD
Here's another hometown favourite, first found in 1967 in the Musgraves Ranges in South Australia. Musgravite is now mined in other locations, including Antarctica, Madagascar, and Sri Lanka. For years, only eight musgravite stones were thought to exist. So if you like to pull out the stops, this precious gem is for you.

7. Bixbite (Red Beryl)
Average Price Per Carat: $10,000 USD
Red beryl ranges from strawberry, cherry, ruby and sometimes even orange. The only gem-quality Bixbite stones hail from Utah, USA, but some lower-quality gems have been found in Mexico and New Mexico. Most red beryl gemstones are under half a carat in weight.
8. Paraiba Tourmaline
Price Per Carat: $10,000 - $20,000 USD
Highly sought after due to their stunning blue tones, Paraiba tourmalines originate from Paraiba, Brazil, and Africa. The darker blue stones in Brazil fetch up to $20,000 per carat, and prices may rise significantly since mines haven't been able to keep up with demand!

9. Alexandrite
Average Price Per Carat: $12,000 USD
Until recently, Alexandrite had only been found in Russia. Today, it is mined in East Africa, Brazil and Sri Lanka. One of the most remarkable attributes of Alexandrite is its ability to change colour depending on the light. Sometimes referred to as 'an emerald by day, ruby by night,' Alexandrite will keep you guessing.
10. Emerald
Average Price Per Carat: $18,000 USD
Rarer than diamonds, emeralds are also more expensive than the same quality diamond. Their colouring ranges from green to blue-green. The darker the colour, the more expensive they are. Historically, emeralds have symbolised paradise and immortality, and today they're mined in Columbia, Brazil and Zambia.
How Do These Stones Compare with Diamonds?
Price
Top-quality diamonds typically sell for $15,000 to $18,000, similar to Emeralds and Paraiba Tourmaline.
Quality
Diamonds are graded using the 4Cs and brilliance. Gemstones a judged on their colour, clarity and carat.
Style
Diamonds offer timeless quality. Gemstones bring a unique and personal appeal.
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