Abrasive Size Equivalency Chart

American Std.Micron SizeEquivalent Mesh
1/40 – 0.5100,000
1/20 – 160,000
1.00 – 214,000
1.51-213,000
2.52-39,000
32-48,000
42-65,000
54-64,500
75-102,800
96-121,800
148-201,400
1510-201,200
1812-251,050
2520-30800
3020-40600
3530-40500
4540-50325
5550-60285
7060-80240
9080-100225
110100-120160

ABRASIVE SIZE EQUIVALENCY CHART

Compliments ofThe International Gem Society


Products and Services Directory

Looking for gemology related products and services? Visit our Products and Services Directory.

Scholarships

IGS seeks to encourage the advancement of students pursuing a higher education. Learn more about the 2014 Clark Scholarship.

eNews Signup

Membership Login