GemSwapperRequests in plain language
Write what you want. AI turns it into structured criteria you can review and edit before anything is saved.
“Unheated blue sapphire, 2–3 ct, cushion, under $2,000/ct”
SapphireBlue2–3 ctCushionNo heat≤ $2,000/ct
- Tanzanite
- Ruby
- Sapphire
- Spinel
- Tsavorite
- Alexandrite
- Aquamarine
- Rhodolite
- Spessartite
- Tourmaline
- Kyanite
- Zircon
- Amethyst
- Apatite
- Scapolite
The gallery
Alexandrite
Rough
Who we are
Gemstone trading, without the guesswork.
GemSwapper is a marketplace for colored gemstones, built for people who have never met. Buyers describe the stone they want. Sellers list what they hold, in the same shared vocabulary. The platform does the matching and keeps both sides to their word.
- Demand first.
- Buyers say what they need. We find it and tell the right sellers.
- Commitments, not chatter.
- Offers, bids and listings are clear, recorded obligations.
- Reputation you can read.
- It comes from completed trades, not self-description.
Marketplace
Fresh from sellers
- Rough
13.7 ct Rough Tourmaline
Medium bluish green
- Weight
- 13.7 ct
- Cut
- Rough crystal
No indications of treatmentReported: Mozambique$145–$177 / ct
Est. $1,987–$2,425 total
- Rough
34.0 ct Rough Tanzanite
Medium-dark violetish blue
- Weight
- 34.0 ct
- Cut
- Rough crystal
HeatReported: Tanzania$200–$243 / ct
Est. $6,800–$8,262 total · negotiable
- Rough
34.0 ct Rough Scapolite
Medium-light slightly orangy yellow
- Weight
- 34.0 ct
- Cut
- Rough crystal
No indications of treatmentReported: Tanzania$40–$49 / ct
Est. $1,360–$1,666 total · negotiable
- Rough
3.5 ct Rough Spessartite Garnet
Medium-light orange
- Weight
- 3.50 ct
- Cut
- Rough crystal
No indications of treatmentReported: Namibia$548–$668 / ct
Est. $1,918–$2,338 total · negotiable
- Rough
15.7 ct Rough Tanzanite
Medium-dark violetish blue
- Weight
- 15.7 ct
- Cut
- Rough crystal
Heat$204–$248 / ct
Est. $3,203–$3,894 total · negotiable
- Rough
28.8 ct Rough Zircon
Medium greenish blue
- Weight
- 28.8 ct
- Cut
- Rough crystal
Heat$141–$172 / ct
Est. $4,061–$4,954 total
- Loose
3.45 ct Tanzanite · Pear Step
Dark violetish blue
- Weight
- 3.45 ct
- Cut
- Pear · Step
Heat$468–$570 / ct
Est. $1,615–$1,967 total · negotiable
- Rough
18.6 ct Rough Ruby
Medium-dark purplish red
- Weight
- 18.6 ct
- Cut
- Rough crystal
HeatReported: Myanmar$1,404–$1,709 / ct
Est. $26,114–$31,787 total · negotiable
What we offer
Tools that make a serious trade simple.
Protected payments
Your money moves through protected payment, not a wire to a stranger.
One gemological language
Requests and listings share the same catalog, so a match means something.
HueToneSaturationCutClarityTreatmentOrigin
Commitments that bind
Offers, bids and listings are recorded obligations, acknowledged in plain language.
Earned reputation
Completed trades, fulfillment and disputes, never self-claims.
Built for your phone
Search, evaluate, negotiate and pay from anywhere.
How it works
From request to a stone in your hands.
- 1
Describe
Tell us the stone you want, in words or with filters.
- 2
Match
We rank available stones and alert buyers and sellers automatically.
- 3
Agree
Evaluate the stone, then buy, offer or bid with clear commitments.
- 4
Receive
Pay through protected payment and track the stone to your door.
Looking for something specific?
Tell us once. We'll match it against sellers and notify you the moment a fit appears.