42 Research, design and development of computer hardware and software for supply chain management all in the field of the authentication, grading, identification, observation, measuring, testing, checking, analysis, inspection, inscription and certification of diamonds, jewellery, precious and semi-precious stones; design and development of computer hardware and software for supply chain management all in the field of the authentication, grading, identification, observation, measuring, testing, checking, analysis, inspection, inscription and certification of diamonds, jewellery, precious and semi-precious stones; gemological services, namely, the authentication, grading, identification, observation, measuring, testing, checking, analysis, inspection, inscription and certification of diamonds, jewellery, precious and semi-precious stones