Login

quartz

Quartz is a relatively well-known gemstone, with many types and quantities in circulation. It is broadly classified into two types: transparent to translucent single crystal and translucent to opaque polycrystal. Single crystal stones include amethyst, citrine, and rose quartz, while polycrystalline stones include chalcedony, agate, and jasper. Many contain other minerals and liquids as inclusions.

Karatz GemMagazine
" quartz "

Sort by
ブラジル産パライバトルマリンインクォーツ 1.287ctルース

Brazilian Paraiba Tourmaline in Quartz 8.0mm/1.287ct Loose Stone Sale price¥29,800
ブラジル産メデューサクォーツ（パライバクォーツ） 7.250ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 7.250ct Loose Sale price¥54,800
レピドクロサイトインクォーツ 0.957ctルース

Brazilian Lepidocrocite in Quartz 0.957ct Loose Stone Sale price¥15,800
【12555024掲載】ライモナイトインクォーツ（オーロラクォーツ） 7.281ctルース

[Dandelion Cut] Brazilian Limonite in Quartz (Aurora Quartz) 13.5mm/7.281ct Loose Stone Sale price¥39,800
ブラジル産ポンポンクォーツ（ラジエーテッド クリスタルインクォーツ） 3.913ctルース

Brazilian Pompon Quartz (Radiated Crystal in Quartz) 3.913ct Loose Stone Sale price¥9,800
【12547827掲載】ブラジル産トラピッチェアメジスト 10.855ctルース

Brazilian Trapiche Amethyst 10.855ct loose stone Sale price¥6,980
【12547833掲載】ブラジル産デュモルチェライトインクォーツ 2.714ctルース

Brazilian Dumortierite in Quartz 2.714ct loose stone Sale price¥24,800
ブラジル産ルチルクォーツ（ルチルレイテッドクォーツ）8.247ct ルース

Brazilian rutilated quartz (rutilated quartz) 8.247ct loose stone Sale price¥14,800
フラワールチルインクォーツ0.955ctルース

Flower rutilated quartz 0.955ct loose stone Sale price¥9,800
Limited to 2 stones: 1 Brazilian Madeira citrine loose stone (round cut, 4.7mm) Multiple purchase discounts available

Limited to 2 stones: 1 Brazilian Madeira citrine loose stone (round cut, 4.7mm) Multiple purchase discounts available Sale price¥3,980
【KEN氏】ブラジル産アメジスト 5mm/0.390ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Brazilian Amethyst 5mm/0.390ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800
コッパールチルクォーツ 1.410ctルース

Brazilian copper rutilated quartz 1.410ct loose stone Sale price¥8,800
コッパールチルクォーツ 1.560ctルース

Brazilian copper rutilated quartz 1.560ct loose stone Sale price¥8,800
コッパールチルクォーツ 1.381ctルース

Brazilian copper rutilated quartz 1.381ct loose stone Sale price¥8,800
ブラジル産コッパールチルクォーツ 1.991ctルース

Brazilian copper rutilated quartz 1.991ct loose stone Sale price¥6,980
グリーンクォーツ 0.743ctルース

[Koshu Precious Stones plusthree] Green Quartz 6mm/0.743ct Loose with Patch Sale price¥25,800
【ムーンシュタイナー】パイライトインクォーツ 18.288ctルース

[Moonsteiner] Pyrite in Quartz 18.288ct Loose Sale price¥59,800
ブラジル産デュモルチェライトインクォーツ 2.932ctルース

Brazilian Dumortierite in Quartz 2.932ct loose Sale price¥25,800
ブラジル産デュモルチェライトインクォーツ 1.894ctルース

Brazilian dumortierite in quartz 1.894ct loose Sale price¥19,800
ブラジル産デュモルチェライトインクォーツ 1.186ctルース

Brazilian dumortierite in quartz 1.186ct loose (faceted cut) Sale price¥12,800
ブラジル産デュモルチェライトインクォーツ 2.625ctルース

Brazilian dumortierite in quartz 2.625ct loose (faceted cut) Sale price¥26,800
ブラジル産デュモルチェライトインクォーツ 1.971ctルース

Brazilian dumortierite in quartz 1.971ct loose (faceted cut) Sale price¥19,800
ブラジル産デュモルチェライトインクォーツ 1.390ctルース

Brazilian dumortierite in quartz 1.390ct loose (faceted cut) Sale price¥15,800
ブラジル産デュモルチェライトインクォーツ 1.573ctルース

Brazilian dumortierite in quartz 1.573ct loose (faceted cut) Sale price¥18,800
Sold out [Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

Sold out [Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set

[Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set

Sold out [Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]

[Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]
Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

Sold out 【猫カット】アメジスト（8mm） - カラッツSTORE

[Cat cut] Amethyst (8mm)

Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》
Sold out Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available}

Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available}
Sold out 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》

Sold out 【宝石商の道具】冷却ヒビ入れ染色クォーツ・天然エメラルド見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz/Natural Emerald Identification 2-piece Set (Discount available for multiple purchases)

Sold out ライモナイトインクォーツ（オーロラクォーツ） 1石 ルース

Lymonite in Quartz (Aurora Quartz) 1 stone loose

Sold out Limited to 20 stones, Brazilian dendritic quartz, 1 loose stone, multiple purchase discounts available

Limited to 20 stones, Brazilian dendritic quartz, 1 loose stone, multiple purchase discounts available
Sold out Madeira Citrine 1 stone 💎5mm-6mm (Madeira Citrine)《November birthstone》《Multiple purchase discount available》

Madeira Citrine 1 stone 💎5mm-6mm (Madeira Citrine)《November birthstone》《Multiple purchase discount available》

Sold out Rose quartz 1 stone (heart, approx. 23ct)《Discount available for multiple purchases》

Rose quartz 1 stone (heart, approx. 23ct)《Discount available for multiple purchases》

Sold out [Available 9/22, 10 PM] 《Limited to 16 stones》 Amethyst Gacha featuring Shimizu Kikouseki’s Sakura and Dandelion cuts 《Multi-purchase discounts available》

[Available 9/22, 10 PM] 《Limited to 16 stones》 Amethyst Gacha featuring Shimizu Kikouseki’s Sakura and Dandelion cuts 《Multi-purchase discounts available》
Sold out Limited to 10 stones: Koshu Precious Stone Kiriko "Broom" plusthree 45ct Dendritic Quartz Gacha (Includes 1 Copper Rutile in Quartz) (Multiple purchase discounts available)

Limited to 10 stones: Koshu Precious Stone Kiriko "Broom" plusthree 45ct Dendritic Quartz Gacha (Includes 1 Copper Rutile in Quartz) (Multiple purchase discounts available)
Sold out 《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》

《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》
Sold out Limited to 10 stones: Paraiba Tourmaline Gacha 💎 Paraiba Tourmaline or Paraiba Tourmaline in Quartz (1 loose stone) [Multiple purchase discounts available]

Limited to 10 stones: Paraiba Tourmaline Gacha 💎 Paraiba Tourmaline or Paraiba Tourmaline in Quartz (1 loose stone) [Multiple purchase discounts available]
Sold out Limited to 15 stones: Blue Stone Gacha (Top-Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) (Multiple purchase discounts available)

Limited to 15 stones: Blue Stone Gacha (Top-Color Benitoite 2.0mm, Paraiba Tourmaline in Quartz, Unheated Yogo Sapphire) (Multiple purchase discounts available)
Sold out Two Koshu Kiriko plusthree stones (average 18 carats) with one Dendritic Quartz Gacha (with one Copper Rutile in Quartz) (Multiple purchase discounts available)

Two Koshu Kiriko plusthree stones (average 18 carats) with one Dendritic Quartz Gacha (with one Copper Rutile in Quartz) (Multiple purchase discounts available)

Sold out Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available

Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available
Sold out 《再販売》ハイヒール（スモーキークォーツ）1石《宝石ハイヒール》》6個 - カラッツSTORE

High heels (smoky quartz) 1 stone (gem high heels)《Multiple purchase discount available》

Sold out 【Available Sept 4 at 10 PM】《13 Stones Only》Expert Artisan Gacha: 14mm Dandelion-Cut Ametrine (Reg. 59,800 JPY) & Koshu Precious Stone Kiriko Citrine (29,800 JPY)《Multi-purchase discounts available》

【Available Sept 4 at 10 PM】《13 Stones Only》Expert Artisan Gacha: 14mm Dandelion-Cut Ametrine (Reg. 59,800 JPY) & Koshu Precious Stone Kiriko Citrine (29,800 JPY)《Multi-purchase discounts available》
Sold out 《Limited to 9 Stones》Color Shift Amethyst Gacha, including a 3.49ct "Kompeito Cut" by Makoto Nakano, normally priced at ¥22,800, and a cut by Mr. Sanje.《Bulk Purchase Discount Available》

《Limited to 9 Stones》Color Shift Amethyst Gacha, including a 3.49ct "Kompeito Cut" by Makoto Nakano, normally priced at ¥22,800, and a cut by Mr. Sanje.《Bulk Purchase Discount Available》
Sold out Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases.

Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases.

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.