Do not go for a gem without a lab test as it is very necessary.The first step is to check for any inclusion on the stone with the naked eye. If you're unable to see any inclusions with your naked eyes, then use a magnifying glass of at least 10X magnification to find out if the gemstone contains any inclusions.You should get a lab test for gems for better quality.
With a professional approach and ethical integrity in work, GSI https://gemscience.net/contact/ as managed to establish itself as a leading and trustworthy company over the years and are able to offer high-quality services in their branches worldwide. Their specialists are experienced and they provide every gem, diamond and jewellery with accurate and reliable documentation in various sizes, layouts or formats, which are easy to understand. Providing delivery of the best quality products and grading services to their customers is their priority and they believe in transparency in work.