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Sold out アメリカ産オレゴンサンストーン 2.467ctルース

Oregon Sunstone from the United States 2.467ct loose stone
Sold out スリランカ産クリソベリルキャッツアイ 0.532ctルース

Sri Lankan Chrysoberyl Cat's Eye 0.532ct Loose Stone
Sold out トラピッチェエメラルド 1.341ctルース

Colombian Trapiche Emerald 1.341ct Loose
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 10.080ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 10.080ct loose
Sold out Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases

Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases
Sold out マダガスカル産サファイア 0.126ルース

Madagascar sapphire 3.0mm/0.126ct loose stone
Sold out ビルマ産ルビー 0.239ルース

Burmese Ruby 0.239ct Loose
Sold out エメラルド 0.156ルース

Emerald 0.156ct loose stone
Sold out カラーシフトアメジスト 1.216ルース

Color shift amethyst 1.216ct loose stone
Sold out ベキリーブルーガーネット（カラーチェンジガーネット） 0.114ctルース

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.114ct Loose Stone
Sold out モンタナサファイア 0.119ctルース

Montana Sapphire 3.0mm/0.119ct Loose (Blue Sapphire)
Sold out モンゴル産アンデシン 0.856ctルース

Mongolian Andesine 0.856ct Loose Stone
Sold out 北海道産オパール 12.492ctルース

Hokkaido Opal 12.492ct Loose Patch
Sold out オーストラリア産グリーンオパール 4.990ctルース

Australian Green Opal 4.990ct Loose
Sold out Limited to 8 stones: 1 loose Madagascar needle-in topaz (average 1.2 carats) Multiple purchase discounts available

Limited to 8 stones: 1 loose Madagascar needle-in topaz (average 1.2 carats) Multiple purchase discounts available
Sold out Limited to 4 sets: Sri Lankan sapphire (2.5mm, round cut) and Sri Lankan glass body set of 2 stones. Discounts available for multiple purchases.

Limited to 4 sets: Sri Lankan sapphire (2.5mm, round cut) and Sri Lankan glass body set of 2 stones. Discounts available for multiple purchases.
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 10.840ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 10.840ct loose
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 9.920ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 9.920ct loose
Sold out Tanzanite rough and loose stone set of 2 (average 3.3ct, special cut) from Tanzania {Multiple purchase discounts available}

Tanzanite rough and loose stone set of 2 (average 3.3ct, special cut) from Tanzania {Multiple purchase discounts available}

Sold out Tanzanite rough and loose stone set of 2 (average 3ct, cushion cut) from Tanzania {Multiple purchase discounts available}

Tanzanite rough and loose stone set of 2 (average 3ct, cushion cut) from Tanzania {Multiple purchase discounts available}

Sold out タンザニア産タンザナイト 0.298ctルース

Tanzanite from Tanzania 0.298ct loose stone
Sold out ピンクトルマリン 0.448ctルース

Brazilian Pink Tourmaline 0.448ct Loose Stone
Sold out アフガニスタン産ハックマナイト 15.600ct原石

Hackmanite from Afghanistan, 15.600ct rough stone
Sold out ブラジル産ロマネサイトインクォーツ 4.331ctルース

Brazilian Romanesite in Quartz 4.331ct Loose Stone

Sold out Limited to 3 stones: Rare twin-type Akoya pearl, 1 loose stone, 4.0-4.5mm, discounts available for multiple purchases

Limited to 3 stones: Rare twin-type Akoya pearl, 1 loose stone, 4.0-4.5mm, discounts available for multiple purchases
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 12.770ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 12.770ct loose
Sold out ミャンマー産パープルスピネル 0.514ctルース

Myanmar Purple Spinel 4.8mm/0.514ct Loose Stone
Sold out [Limited to 9 stones] Argentine Inca Rose (Rhodochrosite, average 1.2ct) [Multiple purchase discount available]

[Limited to 9 stones] Argentine Inca Rose (Rhodochrosite, average 1.2ct) [Multiple purchase discount available]
Sold out [Limited to 10 stones] Inca Rose from Argentina (Rhodochrosite, average 1.5ct) [Multiple purchase discount available]

[Limited to 10 stones] Inca Rose from Argentina (Rhodochrosite, average 1.5ct) [Multiple purchase discount available]
Sold out Brazilian London Blue Topaz 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}

Brazilian London Blue Topaz 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}
Sold out オパール 1.916ctルース

Australian Opal 1.916ct Loose
Sold out カンボジア産カラーレスジルコン 0.533ctルース

Cambodian colorless zircon 0.533ct loose stone
Sold out メキシコ産カンテラオパール 1.794ctルース

Mexican Cantera Opal 1.794ct Loose
Sold out ブルーサファイア 0.279ctルース

Sri Lankan Blue Sapphire 3.8mm/0.279ct Loose
Sold out Limited to 16 stones: 1 Montana sapphire loose stone (including teal blue and bicolor) Multiple purchase discounts available

Limited to 16 stones: 1 Montana sapphire loose stone (including teal blue and bicolor) Multiple purchase discounts available
Sold out Limited to 5 stones: 1 Veracruz amethyst rough stone (from Mexico, February birthstone) Multiple purchase discount

Limited to 5 stones: 1 Veracruz amethyst rough stone (from Mexico, February birthstone) Multiple purchase discount
Sold out コンクパール（火焔模様有り） 2.271ctルース

Dominican Republic Conch Pearl (with flame pattern) 2.271ct loose
Sold out Rose-cut beryllium-treated sapphire, 1 loose stone (4mm, September birthstone) {Multiple purchase discounts available}

Rose-cut beryllium-treated sapphire, 1 loose stone (4mm, September birthstone) {Multiple purchase discounts available}
Sold out アメリカ産オレゴンサンストーン 0.239ctルース

Madagascar Oregon Sunstone 4mm/0.239ct Loose Stone
Sold out スピネル 0.281ct原石

Myanmar Red Spinel 0.281ct Rough Stone (Star of David)
Sold out ライモナイトイントパーズ 3.399ctルース

Brazilian Limonite in Topaz 3.399ct loose stone
Sold out エチオピア産オパール 1.433ctルース

Ethiopian Opal 1.433ct Loose
Sold out Limited to 18 stones: YAG (Yttrium Aluminum Garnet) 1 loose stone (Canary Yellow, 4mm) Multiple purchase discounts available

Limited to 18 stones: YAG (Yttrium Aluminum Garnet) 1 loose stone (Canary Yellow, 4mm) Multiple purchase discounts available
Sold out レピドクロサイトインクォーツ 0.484ctルース

Brazilian Lepidocrocite in Quartz 0.484ct Loose Stone
Sold out ブラジル産スカイブルートパーズ 1.604ctルース

Brazilian Sky Blue Topaz 1.604ct Loose Stone
Sold out Limited to 17 stones, 1 loose Sugilite stone from South Africa, multiple purchase discounts available

Limited to 17 stones, 1 loose Sugilite stone from South Africa, multiple purchase discounts available
Sold out Limited to 8 stones: Ethiopian black opal (heat-treated, identification instructions included, average 2ct, approx. 11x8mm) 1 loose stone (multiple purchase discounts available)

Limited to 8 stones: Ethiopian black opal (heat-treated, identification instructions included, average 2ct, approx. 11x8mm) 1 loose stone (multiple purchase discounts available)
Sold out ミャンマー産トラピッチェルビー 0.125ctルース

Myanmar Trapiche Ruby 2.6mm/0.125ct Loose Stone

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.