Product list

[On sale at 10pm on 10/24] Brazilian Paraiba Tourmaline in Quartz 3.6mm/0.162ct loose stone Sale price¥14,800

[12555221] Brazilian Paraiba Tourmaline in Quartz 0.143ct Loose Stone Sale price¥12,800

[On sale at 10pm on November 9th] Brazilian Paraiba Tourmaline in Quartz 1.146ct loose stone Sale price¥29,800

[12555217] Brazilian Paraiba Tourmaline in Quartz 1.287ct Loose Stone Sale price¥29,800

[On sale at 10pm on 10/16] Brazilian Paraiba Tourmaline in Quartz 7.9mm/1.314ct loose stone Sale price¥29,800

[On sale at 10pm on 14/10] Brazilian Medusa Quartz (Paraiba Quartz) 0.717ct loose stone Sale price¥6,980

[On sale at 10/14 22:00] Brazilian dendritic quartz 3.650ct loose stone Sale price¥5,980

[On sale at 10pm on 10/17] Brazilian Limonite in Topaz 3.399ct loose stone Sale price¥8,800

[On sale at 10pm on 10/17] Colombian Trapiche Emerald 0.629ct loose stone Sale price¥34,800

Brazilian Medusa Quartz (Paraiba Quartz) 2.089ct loose stone Sale price¥16,800

Brazilian Medusa Quartz (Paraiba Quartz) 1.058ct Loose Stone Sale price¥8,800

[On sale at 10pm on 10/17] Kenyan Gold Sheen Sapphire 3.7mm/0.317ct Loose Sale price¥35,800

[On sale at 10pm on 10/17] Kenyan Gold Sheen Sapphire 3.6mm/0.302ct Loose Sale price¥35,800

Kenyan Gold Sheen Sapphire 0.273ct Loose Sale price¥22,800

Kenyan Gold Sheen Sapphire 0.264ct Loose Sale price¥22,800

Kenyan Gold Sheen Sapphire 0.305ct Loose Sale price¥12,800

[On sale at 10pm on November 9th] Kenyan Gold Sheen Sapphire 0.308ct Loose Sale price¥12,800

Pt900/K18ブラックオパールキャッツアイ0.736 ペンダント（ネックレス）

[On sale at 10pm on 13/10] Pt900/K18 Australian black opal cat's eye 0.736ct diamond pendant (necklace) by Chuho Sale price¥258,000

【カメリアカット】カラーシフトアメジスト《コラボ》 18mm/21.330ctルースワッペン

[Camellia Cut] Brazilian Color Shift Amethyst [Collaboration] 18mm/21.330ct Loose Patch Sale price¥69,800

[Camellia Cut] Orange Moonstone 19mm/23.890ct Loose Sale price¥39,800

[Camellia Cut] Rose Quartz 12mm/5.530ct {Collaboration} Loose Patch Sale price¥19,800

Vietnam Cobalt Spinel (Color Shift) 0.014ct Loose Stone, Japan-Germany Exchange Sale price¥15,800

Vietnam Cobalt Spinel (Color Shift) 0.022ct Loose Stone, Japan-Germany Exchange Sale price¥25,800

Vietnam Cobalt Spinel (Color Shift) 0.036ct Loose Stone, Japan-Germany Exchange Sale price¥39,800

Vietnam Cobalt Spinel (Color Shift) 0.025ct Loose Stone, Japan-Germany Exchange Sale price¥25,800

Brazilian Bicolor Pink Euclase 0.236ct Loose Stone, Japan-Germany Sale price¥128,000

Tanzanian Mandarin Garnet 0.383ct Loose Stone Sale price¥19,800

YAG (Yttrium Aluminum Garnet) 7.1mm/1.709ct loose stone Sale price¥12,800

Paraiba tourmaline from Brazil 0.098ct loose Sale price¥19,800

Tibetan bicolor andesine 1.542ct loose stone Sale price¥14,800

Indian Cavansite 1.717ct loose stone Sale price¥8,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 1.416ctルース

Rainbow garnet (andradite garnet) 1.416ct loose from Tenkawa Village, Nara Prefecture Sale price¥8,800

Myanmar Taaffeite 0.470ct Loose GIT Sale price¥24,800

Myanmar Taaffeite 0.650ct Loose GIT Sale price¥39,800

Synthetic Moissanite 12.5mm/6.579ct Loose Stone Sale price¥29,800

Elbaite tourmaline from Mozambique 2.082ct loose stone (CuO: 0.1%, MnO: 1.4%) Sale price¥69,800

Colombian Trapiche Emerald 1.494ct Loose Sale price¥69,800

非加熱ブラジル産パライバトルマリン 0.044ctルース（CuO:1.6%、MnO:2.0%）

Unheated Brazilian Paraiba Tourmaline 0.044ct loose stone (CuO: 1.6%, MnO: 2.0%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.4%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.4%, MnO: 2.3%) Sale price¥69,800

[Koshu Precious Stones plusthree] Peridot 1.644ct Loose Stone Patch Sale price¥49,800

Brazilian Imperial Topaz 0.764ct Loose Stone Sale price¥19,800

Brazilian bicolor tourmaline 0.845ct loose stone Sale price¥15,800

ノンオイルエメラルド 1.030ctルースグベリングベリン（Gübelin）鑑別書

Non-Oil Emerald 1.030ct Loose Gübelin Gübelin Certificate Sale price¥698,000

Colombian emerald 1.321ct loose stone (partly trapiche emerald) Sale price¥98,000

Russian diamond rough (sawable) 0.509ct rough (trigon) Sale price¥168,000

Hana Shinju (Black Pearl) 13mm/18.972ct Loose Pearl Hana Shinju Guarantee Card Sale price¥59,800

Hana Shinju (South Sea Pearl) 11mm/13.962ct Loose Pearl Hana Shinju Guarantee Card Sale price¥59,800

Brazilian Paraiba Tourmaline 16.888ct rough stone Sale price¥69,800

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