Step 3: Practical Gemology
Sometimes, refractive index (RI) and specific gravity (SG) readings alone won’t identify gemstones. More often than not, you’ll need a spectroscope to make a final determination. In a few cases, you can make identifications solely with this fundamental piece of gemological lab equipment. (That saves quite a bit of time). This tool is also …
To read this entire article and hundreds more like it,Become a Member
Already a member? Simply login to your account.