Gem Treatment Value Impact Calculator

Calculate price adjustment factors for treated vs untreated gemstones by treatment type and gem species.

Untreated Price/ct

Carat Weight

Gem Type

Treatment Type

Tab to move between fields

Treated Value

$7,000.00

≈ 7 smartphones

Untreated Value$10,000.00

Value Difference$3,000.00

Discount30%

Treated $/ct$3,500.00

Market AcceptanceWidely Accepted

How to Use This Calculator

Enter the Untreated Price Per Carat for the reference gem without treatment.
Enter the Carat Weight and select the Gem Type: ruby, sapphire, emerald, tanzanite, or aquamarine.
Select the Treatment Type: heat treatment, oiling, beryllium diffusion, glass filling, or irradiation.
Review the price adjustment multiplier and Treated Total Value.
Use the result to disclose treatment impact transparently in gem sales and appraisals.

How the result changes with Untreated Price/ct

Untreated Price/ct: Market price per carat for an untreated stone of this quality
Carat Weight: Weight of the gemstone
Gem Type: Type of gemstone
Treatment Type: Type of treatment applied

Identify Input Parameters
4 parameters
Untreated Price/ct = 5000, Carat Weight = 2, Gem Type = 0, Treatment Type = 0 = 4 input(s) provided
Calculate Treated Value
Treated Value
7000 = $7,000
Calculate Untreated Value
Untreated Value
10000 = $10,000
Calculate Value Difference
Value Difference
3000 = $3,000

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