The most reliable of tests to judge the genuineness of jade stone would be to perform the scratch test. You should rest assured that trusted jewellery Singapore jadeite stone is relatively hard. It would scratch metal or even glass. However, nephrite could be softer. Therefore, performing the scratch test in an improper manner may damage a genuine piece.
In event of the jade stone scratches the steel or glass, chances are higher it could have several of the available alternatives to jade as well. Some of the alternatives would be inclusive of different available forms of prehnite and green quartz.