And 30~ years of skill and experience that can't be easily obtained.

Precision calibrated instruments help also

Knowing how to use instruments is what separates skill. Giving anyone a specialty tool doesn’t yield expert level outcomes.

It’s 58% off, and currently listed at $89k. What a sale!

"It's worth whatever the seller and buyer agree to."

More specifically with gemstones "Guaranteed to appraise at double the value for insurance purposes."