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誕生石一覧

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グリーンランド産ルビー 1石（ハートシェイプ,4mm）

1 Ruby from Greenland (heart shape, 4mm)《Discount available for multiple purchases》 Sale price¥5,980
Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available}

Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available} Sale price¥4,980
March birthstone, aquamarine rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners}

March birthstone, aquamarine rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners} Sale price¥3,980
Diamond loose/certificate transfer fee

Diamond loose/certificate transfer fee Sale price¥5,000
アメジスト・シトリン 4mm（エピコットカット） 2石セット

Amethyst/Citrine 4mm (Epicot cut) 2 stone set《Multiple purchase discount available》 Sale price¥1,980
タンザナイト原石・ルース2石セット（シュガーローフカット）

Tanzanite raw stone/loose 2 stone set (sugar loaf cut)《Multiple purchase discount available》 Sale price¥6,980
《9石限定》ジェムガチャ『春色カラー』💎バイカラートルマリン1石 - カラッツSTORE

Only 1 left! Gem Gacha "Spring Colors" 💎 1 Bicolor Tourmaline (Multiple Purchase Discounts Available) Sale price¥6,980
Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》

Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》 Sale price¥2,980
{For beginners} Gem gacha💎 1 loose gemstone (Chrome tourmaline, Mahenge spinel, etc.) cut by Sri Lankan craftsman Sanjay {Multiple purchase discounts available}

{For beginners} Gem gacha💎 1 loose gemstone (Chrome tourmaline, Mahenge spinel, etc.) cut by Sri Lankan craftsman Sanjay {Multiple purchase discounts available} Sale price¥3,980
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} Sale price¥2,980
Sky blue topaz 1 stone (10mm, flower cut)《Discount available for multiple purchases》

Sky blue topaz 1 stone (10mm, flower cut)《Discount available for multiple purchases》 Sale price¥5,980
Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available Sale price¥4,980
1 stone of green opal from South Africa (discount available for multiple purchases)

1 stone of green opal from South Africa (discount available for multiple purchases) Sale priceFrom ¥2,980
Diamond loose sorting transition fee

Diamond loose sorting transition fee Sale price¥3,000
ネパール産オーシャンブルーカイヤナイト＋ブルーカイヤナイト2石セット《複数購入割引有》

Limited to 20 sets: Nepalese Ocean Blue Kyanite + Blue Kyanite 2-stone set (Multiple purchase discounts available) Sale price¥3,980
[Option] Paraiba Tourmaline component analysis sorting issuance fee

[Option] Paraiba Tourmaline component analysis sorting issuance fee Sale price¥5,000
Limited to 33 stones: 1 rough Arizona turquoise with pyrite (December birthstone) Multiple purchase discounts available

Limited to 33 stones: 1 rough Arizona turquoise with pyrite (December birthstone) Multiple purchase discounts available Sale price¥1,000
ピンクアメジスト1石（チェッカーボードカット,約10ct,14×14mm）

1 stone pink amethyst (checkerboard cut, approx. 10ct, 14 x 14mm)《Discount available for multiple purchases》 Sale price¥4,980
コロンビア産エメラルドキャッツアイ1石ルース（平均0.35ct)《初めての方向け》

Colombian emerald cat's eye 1 stone loose (average 0.35ct)《For first-time users》《Multiple purchase discount available》 Sale price¥12,800
Limited to 25 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases.

Limited to 25 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. Sale price¥4,980
Fire Opal (Common Opal) 2 stone set《Discount available for multiple purchases》

Fire Opal (Common Opal) 2 stone set《Discount available for multiple purchases》 Sale price¥3,980
1 loose Australian opal (heart shape, 4 x 4mm)《Discount available for multiple purchases》

1 loose Australian opal (heart shape, 4 x 4mm)《Discount available for multiple purchases》 Sale price¥3,980
[Limited to 6 stones] [Mr. Sanjay] Mexican opal or Sri Lankan spinel 1 loose stone (with defects) [Multiple purchase discount available]

[Limited to 6 stones] [Mr. Sanjay] Mexican opal or Sri Lankan spinel 1 loose stone (with defects) [Multiple purchase discount available] Sale price¥3,980
Limited to 10 stones Mexican Cantera Opal 1 loose stone (10 x 8 cm) Multiple purchase discounts available

Limited to 10 stones Mexican Cantera Opal 1 loose stone (10 x 8 cm) Multiple purchase discounts available Sale price¥5,980
Limited to 6 stones: 1 loose, unheated silky pink sapphire from Vietnam (milky pink sapphire) Multiple purchase discounts available

Limited to 6 stones: 1 loose, unheated silky pink sapphire from Vietnam (milky pink sapphire) Multiple purchase discounts available Sale price¥5,980
January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners}

January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners} Sale price¥2,980
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 Sale price¥2,980
Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available

Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980
[Jeweler's Tools] Limited Edition Chelsea Color Filter Emerald 2-Piece Set

[Jeweler's Tools] Limited Edition Chelsea Color Filter Emerald 2-Piece Set Sale price¥6,980
Limited to 9 sets Diamond Gacha 💎 Yellow Diamond Rough Stone and Loose Stone Set of 2 《Multiple Purchase Discounts Available》

Limited to 9 sets Diamond Gacha 💎 Yellow Diamond Rough Stone and Loose Stone Set of 2 《Multiple Purchase Discounts Available》 Sale price¥2,980
Limited to 13 stones Gem gacha💎 Beautiful colored tanzanite 7mm, special cut sphene, heliodor (lots of inclusions) 1 loose stone Multiple purchase discounts available

Limited to 13 stones Gem gacha💎 Beautiful colored tanzanite 7mm, special cut sphene, heliodor (lots of inclusions) 1 loose stone Multiple purchase discounts available Sale price¥4,980
Limited quantity: Mozambique grape garnet, 1 loose stone (4 x 6 mm, pear-shaped cut) Multiple purchase discounts available

Limited quantity: Mozambique grape garnet, 1 loose stone (4 x 6 mm, pear-shaped cut) Multiple purchase discounts available Sale price¥3,980
Limited to 9 stones Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite. Multiple purchase discounts available.

Limited to 9 stones Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite. Multiple purchase discounts available. Sale price¥3,980
Limited to 25 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.0 mm) Multiple purchase discounts available

Limited to 25 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.0 mm) Multiple purchase discounts available Sale price¥5,980
Limited to 8 stones: 1 Brazilian ametrine loose stone (concave cut, average 7 carats) Multiple purchase discounts available

Limited to 8 stones: 1 Brazilian ametrine loose stone (concave cut, average 7 carats) Multiple purchase discounts available Sale price¥5,980
[Available at 10 PM on August 11th] Limited to 9 stones: 1 loose Mexican opal stone [Multiple purchase discounts available]

[Available at 10 PM on August 11th] Limited to 9 stones: 1 loose Mexican opal stone [Multiple purchase discounts available] Sale price¥1,980
宝石ガチャ💎クッションカットのトルマリン1石💎 4mm《複数購入割引有》

Gem Gacha💎1 cushion cut tourmaline stone💎 4mm《Multiple purchase discount available》 Sale price¥2,980
Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available] Sale price¥2,980
Limited to 15 stones: Mozambique aquamarine rough + 2 loose stones set. Discounts available for multiple purchases.

Limited to 15 stones: Mozambique aquamarine rough + 2 loose stones set. Discounts available for multiple purchases. Sale price¥2,980
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 Sale price¥2,980
Limited to 14 stones: 1 Santa Maria aquamarine (March birthstone, average 0.39ct) Multiple purchase discounts available

Limited to 14 stones: 1 Santa Maria aquamarine (March birthstone, average 0.39ct) Multiple purchase discounts available Sale price¥3,980
Limited to 7 stones: 1 loose kyanite stone from Nepal (royal blue color, 4mm, round cut) Multiple purchase discounts available

Limited to 7 stones: 1 loose kyanite stone from Nepal (royal blue color, 4mm, round cut) Multiple purchase discounts available Sale price¥2,980
[2 stones remaining] 1 Tanzanian bicolor mint garnet loose stone (UV type) [Multiple purchase discount available]

[2 stones remaining] 1 Tanzanian bicolor mint garnet loose stone (UV type) [Multiple purchase discount available] Sale price¥3,980
Limited to 15 stones, 1 loose Australian iron opal stone, multiple purchase discounts available

Limited to 15 stones, 1 loose Australian iron opal stone, multiple purchase discounts available Sale price¥3,980
Limited to 7 stones! May birthstone special offer! Colombian emerald cat's eye, 1 loose stone (highly transparent cat's eye) Multiple purchase discounts available

Limited to 7 stones! May birthstone special offer! Colombian emerald cat's eye, 1 loose stone (highly transparent cat's eye) Multiple purchase discounts available Sale price¥7,980
Limited to 9 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.5mm) Multiple purchase discounts available

Limited to 9 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.5mm) Multiple purchase discounts available Sale price¥6,980
Limited to 8 stones: 1 Sri Lankan star sapphire loose stone (5mm, round cabochon cut) Multiple purchase discounts available

Limited to 8 stones: 1 Sri Lankan star sapphire loose stone (5mm, round cabochon cut) Multiple purchase discounts available Sale price¥7,980
[Available at 10 PM on August 2nd] {Limited to 8 sets} Gemstone Gacha 💎 1 of the Three Great Gemstones Gacha + 2 Loose Pink Sapphires {Multiple purchase discounts available}

[Available at 10 PM on August 2nd] {Limited to 8 sets} Gemstone Gacha 💎 1 of the Three Great Gemstones Gacha + 2 Loose Pink Sapphires {Multiple purchase discounts available} Sale price¥6,980

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.