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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[Koshu Precious Stone Kiriko] Dumortierite 4.275ct loose

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【甲州貴石切子】アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.876ctルース

[Koshu Precious Stone Kiriko plusthree] Andesine Labradorite (commonly known as Rainbow Moonstone) 0.876ct loose

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[Koshu Precious Stone Kiriko] Color change fluorite 13.550ct loose with patch

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【甲州貴石切子】アメジスト 2.180ctルース（新作カット） - カラッツSTORE

[Koshu precious stone Kiriko plusthree] Rose amethyst 2.18ct loose

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[Koshu Precious Stone Kiriko PlusThree] Pink Amethyst 2.03ct Loose Subaru with Patch

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[Koshu Precious Stone Kiriko PlusThree] Pink Amethyst 2.68ct Loose Color with Patch

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[Koshu Precious Stone Kiriko] Green Quartz 3.528ct Loose Subaru Sakura Kiriko with Patch

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【甲州貴石切子】アイオライトサンストーン 1.510ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Iolite Sunstone 1.510ct Loose

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[Koshu precious stone cut] Opal 0.760ct loose

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[Koshu Precious Stone Kiriko]《Moon-shaped Kiriko》Lemon quartz 3.900ct loose with patch

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[Koshu Precious Stone Kiriko] Moonstone 3.400ct loose

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[Koshu Precious Stone Kiriko] Fire Opal 1.530ct Loose with Patch

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【甲州貴石切子】K18グリーンクォーツ4.592ct ペンダント（2wayタイプ） - カラッツSTORE

[Koshu Precious Stone Kiriko] K18 Green Quartz 4.592ct Pendant (2way type) with patch

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【甲州貴石切子】フローライトインクォーツ4.030ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Fluorite in Quartz 4.030ct Loose

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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] Ametrine 3.400ct loose

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[Koshu Precious Stone Kiriko] Ametrine 2.710ct loose

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[Koshu Precious Stone Kiriko] Rock Crystal 3.920ct Loose

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[Koshu Precious Stone Kiriko] Tanzanite 1.740ct loose

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【甲州貴石切子】アルマンディンガーネット 2.950ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Almandine Garnet 2.950ct Loose with Patch

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[Koshu Precious Stone Kiriko] Bicolor Amethyst 3.530ct Loose Color with Patch

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[Koshu Precious Stone Kiriko] Citrine 3.850ct loose

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[Koshu Precious Stone Kiriko] Lemon Quartz 3.890ct Loose

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【甲州貴石切子】アンデシン・ラブラドライト（通称名レインボームーンストーン） 2.240ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Andesine Labradorite (commonly known as Rainbow Moonstone) 2.240ct loose

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【甲州貴石切子】アルマンディンガーネット 2.460ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Almandine Garnet 2.460ct Loose

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[Koshu Precious Stone Kiriko plusthree] Tinkerbell Quartz 5.190ct Loose (Pink Fire Quartz) Aya "Collaboration" Patch included

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[Koshu precious stone Kiriko plusthree] Pink zircon 1.480ct loose Subaru "Collaboration" with patch

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[Koshu Precious Stone Kiriko] Opal 4.140ct loose

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【甲州貴石切子】アベンチュリンアクアマリン 1.900ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Aventurine Aquamarine 1.900ct 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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[Koshu Precious Stone Kiriko] Rose Amethyst 3.04ct Loose Subaru Sakura Kiriko

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[Koshu Precious Stone Kiriko] Rose Quartz 3.040ct Loose Subaru Sakura Kiriko with Patch

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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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【甲州貴石切子】ロードライトガーネット 1.590ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Rhodolite Garnet 1.590ct Loose with Patch

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[Koshu precious stone Kiriko plusthree] Blue zircon 2.04ct loose "Collaboration" with emblem

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[Koshu Precious Stone Kiriko] Citrine 2.27ct loose with patch

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[Koshu Precious Stone Kiriko] Citrine 3.93ct loose

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[Koshu Precious Stone Kiriko] Citrine 4.51ct loose

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[Koshu precious stone Kiriko plusthree] Moissanite 3.03ct loose

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[Koshu Precious Stone Kiriko] Rose Quartz 2.00ct Loose with Patch

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【甲州貴石切子】ロードライトガーネット 3.77ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Rhodolite Garnet 3.77ct Loose

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[Koshu Precious Stone Kiriko] Citrine 9.26ct loose

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【甲州貴石切子】オレゴンサンストーン 2.350ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Oregon Sunstone 2.350ct Loose

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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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[Koshu Precious Stone Kiriko] Dumortierite in Quartz 3.870ct Loose Subaru "Collaboration" with emblem

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【甲州貴石切子】K18アメトリン4.7190ct ペンダント（ネックレス）日独鑑付 - カラッツSTORE

[Koshu Precious Stone Kiriko] K18 Ametrine 4.7190ct Pendant (Necklace) Japanese-German Appraisal

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[Koshu Precious Stone Kiriko] Morganite 1.910ct 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.

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