Blue sapphire
Royal Blue and Cornflower Blue are trade colour descriptions. Criteria can vary between laboratories and sellers; examine the stone and report wording rather than treating the name as a fixed value grade.
Price & availability on request
Sapphire
From blue to fancy colours, start with the shade you love. Then compare dimensions, treatment and evidence for the actual stone to find sapphire suited to your design.
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- Mineral
- Corundum
- Mohs hardness
- 9
- Colour family
- Blue and other colours, except ruby red
- Birthstone
- September · traditional birthstone
Mohs 9 means excellent scratch resistance, not immunity to chips or fractures. Choose a setting that protects exposed edges and avoid hard impacts.
01 / Colour & form
Choose a colour. Examine the actual stone.
Select a specimen to add its color or variety to your request. Confirm appearance and availability with the offered lot.
Padparadscha
A sapphire in the pinkish-orange to orangy-pink range that meets particular criteria. Not every pink-orange stone qualifies; request a report supporting the designation.
Teal & parti sapphire
Teal describes blue-green hues; parti stones display distinct colour zones, such as blue, green and yellow. Consider how the colours appear face-up and in the intended setting.
Fancy-colour sapphire
Pink, yellow, orange, green, purple and colourless options offer different design possibilities. Sapphire covers corundum other than ruby red; the Thai term phailin specifically means blue sapphire.
02 / Value factors
What makes one stone worth more?
Colour & lighting
Assess hue, saturation, brightness and colour distribution. Request unfiltered photographs or video of the same stone in daylight and indoor light.
Clarity & cut
Check inclusions, surface-reaching fractures, symmetry and face-up brightness. Equal carat weights can give different visible sizes and appearances.
Weight, dimensions & evidence
Separate each stone’s carat weight from the order total; include length × width × depth in millimetres. Compare treatment findings and supporting reports alongside appearance.
03 / Origin
Put origin claims in context
A country name is not a quality grade, and colour cannot establish origin. A laboratory origin conclusion is an expert opinion; some stones remain inconclusive.
- Kashmir
- A historic source associated with fine velvety blue sapphires; every stone still needs its own quality assessment.
- Sri Lanka / Ceylon
- Produces varied colours, including blue and padparadscha. Origin does not establish an unheated condition.
- Madagascar
- An important source of material across a wide quality range, including fine sapphires.
- Montana, USA
- Its deposits offer varied colours, including blue and green. Verify treatment and traceability separately.
- Thailand
- Kanchanaburi and Chanthaburi are established sources. A dark blue appearance alone cannot establish Thai origin.
- Myanmar / Burma
- Another source of fine sapphire; an origin claim needs evidence for the offered stone.
Country-of-origin identification is different from mine-to-market traceability. Labour or environmental claims need evidence for the particular source and supply chain.
04 / Treatments
Understand exactly what has been disclosed
Rough describes an uncut stone; unheated describes treatment status. A faceted stone can be unheated. These terms are not interchangeable.
- No indications of heating
- Use the actual report’s wording. Photographs and seller descriptions do not replace examination, and other possible treatments still need consideration.
- Heat-treated
- Heating can alter colour or clarity and is common in the trade. Ask for a plain-language disclosure and report details, rather than the code H alone.
- Lattice-diffusion treated
- Heat introduces external elements, such as beryllium or titanium, to change colour. This needs separate disclosure from conventional heating, naming the detected treatment.
- Fracture- or cavity-filled
- Ask which substance was used, such as lead glass or another glass, and the extent of filling. Fillers can affect durability, cleaning and repair; inform the jeweller before work.
Choose around the way it will be worn
Engagement & everyday wear
Choose a personal colour, setting-compatible dimensions and a stone without durability-threatening fractures. Teal and fancy colours offer alternatives to blue.
Collecting & heirlooms
Prioritise the individual stone, treatment findings and documented history. Rarity does not guarantee appreciation or an immediate resale.
Gifts & personal milestones
Choose a meaningful colour, a classic blue design or a coordinated colour sequence. Sapphire’s traditional association with September adds a personal touch to a birthstone gift.
05 / Compare offers
Make a fair price comparison
- First match natural or laboratory-grown identity, form and treatment status.
- Compare colour, cut, millimetre dimensions, individual weight and quantity using actual-lot images.
- Verify the report number with its issuer and match its measurements, weight and image to the offered stone.
- Separate per-carat, per-gram, per-stone and per-lot rates; state the currency and total.
- Include confirmed report, setting, shipping and tax costs, plus the seller’s written return terms.
- Share your budget and a competing offer; request up to three alternatives with clear reasons for any price difference.
Specify the quotation basis
Rough: give total grams, or a lot count with its contents described. Faceted stones: give carats per stone, dimensions and quantity. Keep individual weight separate from total weight. Rough weight does not guarantee a finished cutting yield.
| Requested form | Possible quotation unit |
|---|---|
| Rough | Grams (g) / Carats (ct) / Lots |
| Faceted | Carats (ct) / Pieces / Lots |
This guide helps define a specification; it is not a stock list or a confirmed price offer. Availability, reports and prices must be confirmed for each stone or lot.
USD · Observed 2026-10-29
Gemstone price calculator
Build a budget from dated public asking prices, or enter a supplier’s quoted rate. These calculations are not our selling prices or an appraisal.
This small seller sample is an asking-price comparison, not the whole market. Colour, cut and clarity vary. Treatment and origin are seller claims; laboratory reports have not been independently verified.
Price & availability on request
Build your lot request.
Build one lot inquiry. No payment, stock reservation or formal quotation is created here.
06 / Care & questions
Match care to the stone’s condition
Sound natural stones without filling or dyeing can generally be cleaned with lukewarm water, mild soap and a soft brush. For filled or dyed material, use a damp cloth and avoid heat, chemicals, ultrasonic and steam cleaning. If treatment is unknown, seek professional advice first.
Questions before you decide
Can a photograph show that sapphire is unheated?
No. Images help assess appearance, but heating status requires examination of the stone and the laboratory report’s wording.
What percentage more does unheated sapphire cost?
There is no universal percentage. Compare colour, clarity, cut, size, documented origin and sale terms on a like-for-like basis.
What should be confirmed before ordering?
Request actual-lot photographs, identity and treatment information, availability, currency, shipping and tax terms. Origin preferences and report requests need separate confirmation.
Start with a question
Explore another gemstone or follow a buying question to the relevant guide.
Before you agree to a gemstone purchase
Use this checklist for the actual stone or lot. Collection illustrations and general descriptions are not proof of identity, origin or availability.
Ask for current photos or video of the identified lot, with dimensions in millimeters, weight and number of pieces.
Request written disclosure of natural or laboratory-grown identity, known treatments and any origin claim. Match a report to the actual stone and verify its number with the issuing laboratory.
Confirm total price, currency, unit, delivery, taxes, payment and return terms in writing before agreeing.
For a Bangkok visit, contact the company first to confirm an appointment and the stones you wish to inspect. Bring your dimensions, budget and report requirements.
Questions that help you choose
Does the same carat weight mean the same size?
No. Carat measures weight: 1 ct = 0.2 g. Different densities, shapes and cutting proportions give different face-up sizes. For a setting, request length × width × depth in millimeters as well as weight; for rough, ask for usable dimensions and visible fractures.
What does a laboratory report establish?
Read the scope and conclusions of that particular report. Identification, treatment findings and origin opinions are different questions. A report is not a price guarantee or proof that a seller currently has the stone. Check that the documented item matches the offer.
How the quotation works
Prices for these collections are confirmed per lot. A gram, carat, piece or lot rate must match the material being offered. Amber price bands and bulk discounts do not apply automatically to other gemstones.
Read more
Ask the team to confirm availability, treatment disclosures, price currency, shipping and tax terms in the formal quotation.
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