Loose gemstones · Wholesale & trade · Bangkok · Worldwide supply
KCT IMPEX · Gemstone catalogue
A world
of colour.
Explore loose gemstones by colour and variety. Speak with our team about your next stone.
Bangkok · Worldwide supply
Colour, cut & possibilityWholesale & trade enquiries
Calibrated & free sizes
Bangkok JTC showroom
Enquire for current availability
Explore the range
Find your colour.
Search by name or colour. Enquire for individual stones and current availability.
Gemstones & quartz varieties
32 gemstone varieties
Kunzite
Blue topaz
Grossular Garnet
Amethyst
Citrine
Sapphire
Emerald
Ruby
Spinel
Chrome diopside
Moonstone
Apatite
Tourmaline
Peridot
Onyx
Opal
Color-change fluorite
Tsavorite
Morganite
Tanzanite
Zircon
Iolite
Kyanite
Aquamarine
Clear quartz
Rose quartz
Smoky quartz
Rutilated quartz
Milky quartz
Lemon quartz
Ametrine
Lavender moonstone
No matching stones. Try another name or colour, or send us your brief.
KCT inventory photographs are shown for published selections. Other photographs illustrate gemstone varieties; enquire for current availability and individual stone details.
Reference photo credits
- Amethyst: James St. John · CC BY 2.0
- Sapphire: Sapphiredge · CC BY-SA 3.0
- Emerald: Gaumania · CC0 1.0
- Ruby: Sasaki kijinuko / Gaumania · CC BY-SA 4.0
- Spinel: STARLANKA
- Moonstone: Gemsphoto · CC BY-SA 4.0
- Apatite: Didier Descouens · CC BY 3.0
- Peridot: STARLANKA
- Onyx: W.carter · CC BY 4.0
- Color-change fluorite: GemSelect
- Tsavorite: Star Ruby
- Morganite: Natural Gemstones
- Tanzanite: Didier Descouens · CC BY 3.0
- Zircon: 247Gems · CC BY-SA 3.0
- Iolite: Crystalarium
- Kyanite: Didier Descouens · CC BY-SA 4.0
- Aquamarine: Darla Sondrol / GeoDIL · CC0
- Clear quartz: Didier Descouens · CC BY-SA 3.0
- Rose quartz: Mauro Cateb, edited by W.carter · CC BY 3.0
- Smoky quartz: Siam Gems Club
- Rutilated quartz: W.carter · CC BY 4.0
- Milky quartz: Siam Gems Club
- Lemon quartz: Source listing
- Ametrine: Gemsphoto · CC BY-SA 4.0
- Lavender moonstone: TajIndiaGems via Etsy
From our gemstone photographs
Colour, up close.
A selection of colour and cut from our photographs.
Photographs show examples of stones and cuts. Availability, origin and any known treatments are confirmed individually.
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What are you
looking for?
Send your brief. Our team can share suitable options, photographs and videos.
01 / GemstoneVariety & colour
02 / Size & cutCarat weight, dimensions & shape
03 / Your briefQuantity, budget & timing