Koshu precious stone cut glass

Koshu Precious Stone Kiriko was developed by applying cutting techniques such as Edo Kiriko and Satsuma Kiriko. It was born from a collaboration between Yoichi Fukazawa of Jewelry Craft Fukazawa and Yukio Shimizu of Shimizu Precious Stone. Koshu Precious Stone Kiriko is made using a cutting method that is a world first, with Fukazawa in charge of the cut surfaces and Shimizu in charge of the facet surfaces. The stunning cuts, full of originality and like works of art, are combined with the individuality of the gemstones to make them truly one of a kind. There are dozens of patterns in total that combine surface cuts such as rose cuts and checkerboard cuts with several types of cut glass, and it is also possible to enjoy the luxury of collecting and arranging stones with various cuts.

Carats Gem Magazine
" Koushuu precious stone cut glass "

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Neko Kiriko "Cat x Koshu Precious Stone Kiriko Plus Three" Amethyst 12mm/5.173ct Loose Patch

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【甲州貴石切子】《月型切子》メキシコ産ハイアライトオパール 0.788ctルース日独鑑

[Koshu Precious Stone Cut] [Moon-shaped Cut] Mexican Hyalite Opal 0.788ct Loose Stone by Nikko Kan

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[Koshu precious stone Kiriko plusthree] Peridot 6mm/0.798ct《Aya》 Loose with emblem

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[Koshu precious stone Kiriko plusthree] Synthetic moissanite 11mm/4.157ct《Collaboration》 Loose with emblem

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[Koshu precious stone Kiriko plusthree] Swiss blue topaz <light> 3.844ct loose

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[Koshu precious stone Kiriko plusthree] Swiss blue topaz <Subaru> 3.985ct loose

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Neko Kiriko《Cat x Koshu precious stone Kiriko plusthree》Amethyst 1.540ct loose

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[Lottery sale] [Koshu precious stone cut glass] Rock crystal 6mm/0.650ct loose

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[Koshu Precious Stones Plusthree] Andesine 13.106ct Loose Stone

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[Koshu Precious Stones Plusthree] Sky Blue Topaz 4.415ct Loose

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【4/20 22時販売】【甲州貴石切子】《桜切子》ラベンダークォーツ（スコロライト） 5.964ctルースワッペン付 - カラッツSTORE

[Koshu Precious Stone Kiriko]《Sakura Kiriko》Lavender Quartz (Scololite) 5.964ct loose with emblem

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[Koshu precious stone Kiriko plusthree] Ametrine 9.279ct loose with patch

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[Koshu precious stone Kiriko plusthree] Spinel 1.502ct loose with patch

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【甲州貴石切子plusthree】アイオライトサンストーン 1.587ct《コラボ》ルース《暁》ワッペン付

[Koshu precious stone Kiriko plusthree] Iolite sunstone 1.587ct《Collaboration》 Ruth《Akatsuki》 Patch included

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【甲州貴石切子plusthree】アイオライトサンストーン 0.868ct《コラボ》ルース《昴》ワッペン付

[Koshu precious stone Kiriko plusthree] Iolite sunstone 0.868ct《Collaboration》Ruth《Subaru》 Patch included

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[Koshu Precious Stone Kiriko] Rose Amethyst 5.347ct Loose with Patch

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【甲州貴石切子pluesthree】ピンクスピネル 0.943ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Pink spinel 0.943ct loose with patch

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[Koshu precious stone Kiriko plusthree] Garnet 1.490ct loose

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[Koshu precious stone Kiriko plusthree] Particolor tourmaline 3.544ct loose

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【甲州貴石切子plusthree】ローズクォーツ 14.360ct《コラボ》ルースワッペン付

[Koshu precious stone Kiriko plusthree] Rose quartz 14.360ct《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 10.090ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Dendritic quartz 10.090ct loose with patch

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【甲州貴石切子plusthree】ピクチャーメノウ 10.631ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Picture agate 10.631ct loose with patch

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【甲州貴石切子plusthree】ローズクォーツ 15.357ct《コラボ》ルースワッペン付

[Koshu precious stone Kiriko plusthree] Rose quartz 15.357ct《Collaboration》 Loose with emblem

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【甲州貴石切子plusthree】ローズクォーツ 17.855ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Rose quartz 17.855ct loose with patch

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【甲州貴石切子plusthree】ロッククリスタル 15.588ct《切子玉》ルースワッペン付

[Koshu Precious Stone Kiriko PlusThree] Rock Crystal 15.588ct《Kirikodama》 Loose with Patch

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【甲州貴石切子】スイスブルートパーズ 16.682ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Swiss Blue Topaz 16.682ct《Collaboration》 Loose with emblem

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【甲州貴石切子】ティンカーベルクォーツ（ピンクファイヤークォーツ） 7.187ctルースワッペン付

[Koshu Precious Stone Kiriko] Tinkerbell Quartz (Pink Fire Quartz) 7.187ct Loose with Patch

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[Koshu Precious Stone Kiriko] Oregon Sunstone 2.141ct《Collaboration》Loose with emblem

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[Koshu Precious Stone Kiriko] Ametrine 6.214ct《Collaboration》Loose with emblem

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【甲州貴石切子】メキシコ産ファイアオパール 1.318ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Fire Opal from Mexico 1.318ct《Collaboration》 Loose with emblem

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【甲州貴石切子plusthree】バイカラーアメジスト 3.119ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Bicolor amethyst 3.119ct loose with patch

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[Koshu Precious Stone Kiriko] Ametrine 3.224ct loose with patch

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[Koshu Precious Stone Kiriko] Swiss Blue Topaz 6mm Loose with Patch

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【甲州貴石切子plusthree】ブルートパーズ 7.433ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Blue topaz 7.433ct loose with patch

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[Koshu Precious Stone Kiriko] Quartz 6mm loose

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[Koshu precious stone Kiriko plusthree] Citrine 0.983ct with patch

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【甲州貴石切子plusthree】ロンドンブルートパーズ 3.479ctルースワッペン付

[Koshu Precious Stone Kiriko PlusThree] London Blue Topaz 3.479ct Loose with Patch

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[Koshu precious stone Kiriko plusthree] Amethyst 4.686ct loose with emblem

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【甲州貴石切子】メキシコ産ファイアオパール 1.586ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Fire Opal from Mexico 1.586ct《Collaboration》 Loose with emblem

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【甲州貴石切子】《月型切子》アメトリン 12.681ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko]《Moon-shaped Kiriko》Ametrine 12.681ct《Collaboration》Loose Patch

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[Koshu Precious Stone Kiriko] Opal from Mexico 2.905ct 《Collaboration》 Loose with emblem

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[Koshu Precious Stone Kiriko] Oregon Sunstone 2.674ct《Collaboration》Loose with emblem

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【甲州貴石切子】ロンドンブルートパーズ 12.996ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] London Blue Topaz 12.996ct《Collaboration》Loose with emblem

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【甲州貴石切子】ローズクォーツ 5.482ct《コラボ》ルースワッペン付《桜切子》

[Koshu Precious Stone Kiriko] Rose Quartz 5.482ct《Collaboration》With Loose Patch《Sakura Kiriko》

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[Koshu Precious Stone Kiriko] Rhodolite Garnet "Collaboration" 5.287ct loose with emblem

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【甲州貴石切子】スモーキークォーツ《コラボ》134.252ct(45×27mm)ルースワッペン付

[Koshu Precious Stone Kiriko] Smoky Quartz [Collaboration] 134.252ct (45 x 27mm) Loose with emblem

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[Koshu Precious Stone Kiriko] Actinolite in Quartz 2.834ct loose with emblem

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[Koshu precious stone Kiriko plusthree] Blue topaz 6.978ct loose

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments