Estimated range
Ruby
Corundum
$120-$6,000/ct
Gemstone Appraisal by Photo
Gemstone Value Calculator
Use this gemstone appraisal by photo tool to estimate value in seconds after upload.
Last updated:
Estimate pricing for rough and cut gemstones, including ruby, sapphire, emerald, diamond, opal, topaz, and more. Use this as a market guide before deciding whether to seek a formal appraisal.
4.7on App Store and Google Play
No account needed
Rough + cut gems
Instant value range
How This Gemstone Value Calculator Works
From photo upload to price range in 4 quick steps
STEP 01
Upload Gemstone Photo
Take a clear close-up in natural light. JPG, PNG, and WebP are supported up to 6MB.
STEP 02
Confirm Stone Match
We detect likely gemstone matches and you pick the best option before pricing.
STEP 03
Answer Quality Questions
Add details like cut or rough form, size or carat, color quality, and treatment status.
STEP 04
Get Value Estimate
Receive an instant market value range and key factors that affect your stone's pricing.
What Impacts Gemstone Value Most
Key pricing signals used in gemstone valuation
Color and Saturation
Rich, even color usually raises value. Top shades in ruby, sapphire, and emerald command premiums.
Clarity and Inclusions
Cleaner stones are often more valuable, but some inclusions are expected in gems like emerald.
Carat and Dimensions
Price can increase sharply with size when quality is also strong, especially in fine colored stones.
Cut Quality or Crystal Form
For cut gems, symmetry and brilliance matter. For rough, crystal habit and specimen aesthetics matter.
Treatments and Origin
Untreated stones and premium origins can raise value. Common treatments often reduce market pricing.
Popular Gemstones and Typical Value Ranges
Approximate market ranges shown for quick comparison
Estimated range
Sapphire
Corundum
$80-$4,500/ct
Estimated range
Emerald
Beryl
$150-$7,000/ct
Estimated range
Diamond
Native carbon
$500-$12,000/ct
Estimated range
Opal
Hydrated silica
$25-$3,000/ct
Estimated range
Topaz
Silicate
$20-$1,500/ct
Estimated range
Garnet
Garnet group
$15-$1,200/ct
Estimated range
Tourmaline
Borosilicate
$30-$2,500/ct
Value ranges are rough estimates and can vary by quality grading, treatment, origin, and active market demand.
Photo Tips for Better Gem Value Estimates
Better photos produce tighter and more reliable value ranges
Do this
Use bright natural light
Natural light keeps color and transparency closer to reality for better valuation.
Capture multiple angles
Include top and side views to show shape, facet quality, and luster behavior.
Use neutral background
White or gray backgrounds reduce color cast and make clarity easier to evaluate.
Avoid this
Avoid flash
Flash can hide inclusions and wash out subtle color zoning.
Avoid blur
Blurry photos reduce confidence and can cause lower quality matches.
Avoid heavy filters
Edited color and contrast can distort the value signal in your image.
Estimate vs Professional Appraisal
Use this page for fast online guidance. Use certified appraisal for insurance, legal documentation, or expensive transactions.
Best for this tool: quick screening, resale planning, and deciding if your stone needs formal grading.
Use a pro when: estimated value is high, buyer requires documents, or you need insurance-grade reporting.
Suggested next step: save your results in the app and compare updated estimates as market conditions change.
Best in the Ruby Glint app
Unlimited gemstone valuations
Saved valuation history
Detailed quality reports
Rockhounding map with 260,000+ locations
Upgrade to the App
Want Unlimited Gemstone Valuations?
Download Ruby Glint for unlimited value checks, saved reports, and deeper stone analysis tools.
Frequently Asked Questions
Get answers to common questions about rock identification, rockhounding, and using our platform.
Yes. You can upload a photo and get a gemstone value estimate in your browser for free.
Value depends on stone type, color, clarity, size, cut or crystal quality, treatments, and origin. This tool gives a realistic range based on your photo and answers.
No. This is an automated online estimate for educational use. For insurance, legal, or high-value sales, use a certified gemologist or appraiser.
Yes. The flow supports rough crystals and cut stones, then asks the right follow-up questions for each form.
Ruby, sapphire, emerald, diamond, opal, topaz, garnet, tourmaline, and many other gemstones and minerals are supported.
Gem markets vary by quality grading, buyer type, treatments, and sales channel. A range is usually more realistic than a single fixed price.
Use clear natural-light photos, include multiple angles, and answer quality questions carefully, especially carat, clarity, and treatment.
Free Online Tool
Ready to Appraise Your Gemstone?
Scroll up and start your free gemstone appraisal now.
Works instantlyRough + cut supportFree value range