Our Montana sapphire infinity ring features an infinity symbol on both sides of this stunning round sapphire. This ring has a beautiful 4mm blue Montana sapphire. Sapphires are a very durable stone that wears well. This sapphire infinity ring has a delicate open feel while being built strong enough for years of wear. This would make a wonderful promise ring if you’re in the market for that. We know you’ll love this dazzling ring.