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 "

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Oil-in-quartz 0.629ct rough stone from Pakistan (twins, moving bubble type)

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Lepidocrocite in quartz 26.427ct loose

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K18PGティンカーベルクォーツ（ピンクファイヤークォーツ）1.512ct リング - カラッツSTORE

K18PG Tinker Bell Quartz (Pink Fire Quartz) 1.512ct Ring

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【12539375掲載】スリランカ産ガーネットインクォーツ 1.099ctルース

Garnet-in-Rose Quartz from Sri Lanka 1.099ct Ruth Japanese-German Edition

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【甲州貴石切子plusthree】デンドリティッククォーツ 17.110ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Dendritic quartz 17.110ct loose with patch

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Tinker Bell Quartz (Pink Fire Quartz) 3.247ct loose

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【12533686掲載】ティンカーベルクォーツ（ピンクファイヤークォーツ） 4.178ctルース

Tinker Bell Quartz (Pink Fire Quartz) 4.178ct loose

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【桔梗カット】ティンカーベルクォーツ 5.050ctルース《シミズ貴石代表・清水幸雄氏》

[Kikyo Cut] Tinker Bell Quartz 5.050ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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【さくらインカット】ティンカーベルクォーツ 3.670ctルース - カラッツSTORE

[Sakura Incut] Tinkerbell Quartz 3.670ct Loose (Pink Fire Quartz)

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[Kikyo cut] Oil-in quartz 4.010ct loose [Shimizu Precious Stone Representative Yukio Shimizu] Patch included

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【甲州貴石切子】フローライトインクォーツ 4.550ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Fluorite in Quartz 4.550ct Loose

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[Koshu Precious Stone Kiriko] Lemon Quartz 3.890ct Loose

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【甲州貴石切子】レピドクロサイトインクォーツ 1.590ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Lepidocrocite in Quartz 1.590ct Loose

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[Konpeito] Milky quartz 3.260ct loose

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【甲州貴石切子】グリーンアメジスト（プラシオライト） 3.340ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Green Amethyst (prasiolite) 3.340ct loose

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Amethyst 6.480ct loose (vortex cut)

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K18PG amethyst ring

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【さくらインカット】K18PGアメジスト0.61ct リング - カラッツSTORE

[Sakura in-cut] K18PG amethyst 0.61ct ring

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【甲州貴石切子】バイカラーアメジスト 2.390ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Bicolor Amethyst 2.390ct Loose

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Dumortierite in quartz 4.994ct loose

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K18レモンクォーツ16.465ct・ダイヤモンドペンダント（甲州貴石切子） - KARATZ STORE｜カラッツSTORE

[Koshu Precious Stone Kiriko] K18 Lemon Quartz 16.465ct Pendant Japanese-German Appraisal

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K18ラベンダークォーツ（スコロライト）4.00ct ペンダントトップ - KARATZ STORE｜カラッツSTORE

K18 Lavender Quartz (Scololite) 4.00ct Pendant Top

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【10/10 22時販売】ブラジル産デュモルチェライトインクォーツ 0.757ctルース Sale price¥8,800

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Brazilian Flower Rutile in Quartz 3.312ct Loose Stone

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Limited to 2 stones: 1 Brazilian Madeira citrine loose stone (round cut, 5.5mm) Multiple purchase discounts available Sale price¥3,980

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Brazilian copper rutilated quartz 2.101ct loose stone

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Brazilian copper rutilated quartz 1.465ct loose stone

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[Koshu Precious Stones Plusthree] Lavender Quartz (Scorolite) 1.761ct Loose Stone

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Brazilian Dumortierite in Quartz 0.495ct loose stone

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Copper rutilated quartz 1.747ct loose

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Pakistani oil-in quartz 0.595ct loose

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[Sakura in-cut] Lavender quartz (scorolite) 8mm/ 2.161ct loose

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[Koshu precious stone Kiriko plusthree] Smoky quartz 6mm/0.691ct loose with patch

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Garden quartz 23.495ct loose Sale price¥3,980

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Lazurite in quartz 0.959ct loose

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Lazurite in quartz 0.877ct loose

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Lazurite in quartz 0.353ct loose

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Brazilian dumortierite in quartz 3.901ct loose

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Brazilian Medusa Quartz (Paraiba Quartz) 6.954ct loose

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Hollandite in quartz 7.300ct loose

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[Koshu Precious Stone Kiriko]《Moon-shaped Kiriko》Citrine 6.097ct《Collaboration》With loose patch Sale price¥69,800

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【ダンデライオンカット】スモーキークォーツ 25mm/41.745ct《コラボ》ルース（6枚花びら）ワッペン付

[Dandelion Cut] Smoky Quartz 25mm/41.745ct《Collaboration》Loose (6 petals) with patch

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[Koshu precious stone Kiriko plusthree] Light citrine 2.490ct loose with patch

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【さくらインカット】グリーンクォーツ 20mm/22.840ct《コラボ》ルースワッペン付 - カラッツSTORE

[Sakura Incut] Green Quartz 20mm/22.840ct《Collaboration》Loose with emblem

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【甲州貴石切子plusthree】デンドリティッククォーツ 45.929ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Dendritic quartz 45.929ct loose with emblem

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【甲州貴石切子】ライモナイトインクォーツ（オーロラクォーツ） 8.066ctルース

[Koshu Precious Stone Cutting] Brazilian Limonite in Quartz (Aurora Quartz) 8.066ct Loose

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[Takeshi Yamamoto] 8.130ct Rock Crystal Loose Stone (Fire Flower)

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【甲州貴石切子plusthree】スモーキークォーツ 5.074ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Smoky quartz 5.074ct loose with patch

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.