If it is a cheap gemstone, then it is always recommended that a new ring be worn. However, if the gemstone is expensive, the following steps should be followed.
1. Check if the gemstone is not defective in any way. The gemstone should not be cracked or chipped.
2. Check if the native who is going to wear it, his/her horoscope supports wearing such a stone. Otherwise it will give negative results.
3. Energize the ring before wearing it.
Blessings,
Navneet Khanna
Vedic Astrologer