It is difficult for an ordinary consumer without professional training to distinguish ruby from tourmaline with the naked eye. The following items are for reference only. If you encounter more expensive samples, it is safer to go to a professional appraisal agency to issue a certificate.

1, ruby and tourmaline have dichroism, but tourmaline has stronger dichroism, that is, from the side, the color difference is more obvious from the front.

The purple tone of rubies is often more obvious than rubies.

2. Dark red tourmaline often contains abundant internal inclusions, especially bundles of tubular inclusions, which are not common in rubies.

3. Ruby has a higher refractive index, that is, it appears brighter under the same illumination, but please note that under the same polishing conditions.

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