The percentage system is adopted for both theory and skill appraisal, and the contents of theoretical requirements and skill operation requirements account for 100% respectively. The scores of both exams are above 60, which is considered as qualified. Description of content and specific gravity of intermediate diamond inspector: 1. Composition of legal units of measurement and usage of common legal units of measurement (1) Familiar with the basic concepts and advantages of international units (2) Familiar with the composition of legal units of measurement (3) Mastering 5% basic knowledge of usage of common legal units of measurement in this major. 2. General knowledge of errors and common methods of data processing (1) Understand the concepts of random errors, systematic errors and gross errors and the main ways to reduce all kinds of errors (2) Understand the methods of checking and eliminating outliers 5% 3. Basic knowledge of electrical and electronic technology (1) Familiar with the structure and working principle of electrical instruments (2) Familiar with the measurement of voltage, current, resistance and power (3) Familiar with the basic electrical control circuit of working machinery. Basic knowledge of optics and related geology (1) Understand the general characteristics of light (2) Understand the basic knowledge of light refraction and dispersion (3) Understand the basic concepts of minerals and rocks (4) Understand the difference between crystals and amorphous 15% professional knowledge 1. Basic knowledge of diamond (1) Understand the chemical composition, crystal structure, morphology and general physical and optical characteristics of diamond (2) Understand the origin, occurrence and distribution of diamond 10% 2. General contents of diamond classification standard (1) Understand the basic contents of the national standard "Diamond Classification" (2) Understand the terms and classification of polished diamonds of the International Organization for Standardization (CIBJO) and the basic points of the diamond classification standard in the Handbook of Diamonds, Gems and Pearls 10% 3. Preliminary knowledge of detecting the authenticity and quality classification of diamonds (1) Understand the inspection of diamonds with naked eyes or instruments. Methods and operating procedures of quality grading (2) Understand the essentials and degree of detecting diamond cutting and grinding quality with naked eyes or instruments. Basic knowledge of sampling inspection (1) Understand the concept of sampling inspection (2) Understand the methods of general random sampling and stratified random sampling 5% 5. Know the structure, use and maintenance knowledge of common testing instruments (1). Be familiar with the structure, performance and application scope of common testing instruments and tools. (2) Be familiar with the use and maintenance knowledge of common testing instruments, tools and auxiliary equipment. (3) Be familiar with the debugging methods and troubleshooting methods of common testing instruments and tools. 15% Other knowledge 1. Main factors affecting diamond quality grading (1) Understand the grading environmental conditions; The influence of testing tools, instruments, equipment, operating skills of testers and testing methods on diamond quality classification is 5% 2. Knowledge of diamond cutting and grinding technology (1) Familiar with common knowledge of diamond cutting and grinding technology (2) Familiar with diamond processing characteristics of different crystals 5% Skill requirements: 1. Selection of common testing instruments, debugging and elimination of common faults (1) debugging and use of balance, projector and thermal conductivity meter (2) troubleshooting of common faults of balance, projector and thermal conductivity meter (10%) equipment use and technical application (2) skillful use of common testing instruments and measuring tools (1) mechanical and electronic balance. Measure the main parameters of a diamond with measuring tools such as measuring board (3) Estimate the weight of a single diamond with measuring tools (65,438+05%) Operation skills (65,438+0) Identify and classify rough diamonds and finished small diamonds according to standards (65,438+0) Identify rough diamonds or finished small diamonds with magnifying glass and thermal conductivity meter (2) Identify ordinary rough diamonds according to standards. Classification of color and clarity (3) Preliminary classification of the quality of bare or inlaid diamonds is 35%. 2. The inspection of cutting and grinding quality of semi-finished diamonds can be carried out in a single process according to technological requirements (1), and the inspection of cutting and grinding quality of pavilions and crowns can be carried out according to technological requirements (2) Measuring the cutting and grinding ratio and angle of diamonds with inspection instruments and measuring tools (3) Preliminary evaluation of diamond cutting and grinding with magnifying glass 10 times 20%. Arrange inspection data, fill in inspection report correctly (1), record and sort out inspection data correctly (2) analyze and judge inspection data, fill in inspection report correctly 10%, others 1. Can distinguish the quality of diamonds (1)