gray/gray gemstones

Gemstones that exhibit gray or gray hues include gray diamonds, gray spinels (platinum spinels), gray sapphires, and other gemstones that contain gray inclusions, such as platinum rutilated quartz. It has a chic and calm atmosphere, and gives off a unique charm that is different from jewelry with gorgeous colors.

[On sale 11/4 at 22:00] Tanzanian blue spinel 1.028ct loose stone Sale price¥39,800

[11/4 22:00 Sale] Myanmar Musgravite 0.090ct Loose GLT Grade Sale price¥148,000

[On sale 11/8 at 22:00] Brazilian platinum rutilated quartz (brookite in quartz) 1.492ct loose stone Sale price¥9,800

[On sale 11/8 at 22:00] Brazilian platinum rutilated quartz (brookite in quartz) 1.258ct loose stone Sale price¥7,980

[On sale at 10pm on November 9th] Australian black opal 0.386ct loose Sale price¥39,800

【甲州貴石切子】ルチルクォーツ（ルチルレイテッドクォーツ） 12.860ctルース《コラボ》ワッペン

[On sale from 10/21 at 10pm] [Koshu Precious Stone Cut] Brazilian Rutile Quartz (Rutile-Rated Quartz) 12.860ct Loose Stone [Collaboration] Patch Sale price¥59,800

Brazilian bicolor tourmaline 0.326ct loose stone Sale price¥8,800

Grace Spinel 0.384ct Loose Sale price¥9,800

Sri Lankan Silky Sapphire 6.4mm/1.036ct Loose Stone Sale price¥12,800

Silky Sapphire from Sri Lanka 1.716ct loose stone Sale price¥14,800

Myanmar Taaffeite 6.9mm/1.408ct loose stone Sale price¥98,000

Ethiopian Opal 5.2mm/0.688ct Loose (Sphere) Sale price¥6,980

Ethiopian Opal 5.4mm/0.818ct Loose (Sphere Cut) Sale price¥9,800

【12552578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） 1.082ctルース

[Koshu Precious Stone Cut] Brazilian Tinkerbell Quartz (Pink Fire Quartz) 1.082ct Loose Patch Sale price¥35,800

Indian Moonstone 1.946ct Loose Sale price¥14,800

Tanzania gray spinel 0.889ct loose stone Sale price¥19,800

Brazilian platinum rutilated quartz (brookite in quartz) 2.740ct loose stone Sale price¥9,800

ブラジル産プラチナルチルクォーツ（ブルッカイトインクォーツ） 2.201ctルース

Brazilian platinum rutilated quartz (brookite in quartz) 2.201ct loose stone Sale price¥6,980

Tanzania Bicolor Zoisite 4.2mm/0.299ct Loose Stone Sale price¥7,980

Tanzania Bicolor Zoisite 4.1mm/0.273ct Loose Stone Sale price¥6,980

Synthetic Moissanite 5.8mm/0.678ct Loose Stone Sale price¥9,800

Synthetic Moissanite 5.8mm/0.682ct Loose Stone Sale price¥9,800

Brazilian Green Tourmaline 0.825ct Loose Stone Sale price¥9,800

Australian black opal 3.242ct loose stone Sale price¥69,800

Australian black opal 3.322ct loose stone Sale price¥98,000

Australian black opal 0.357ct loose stone Sale price¥8,800

Australian black opal 0.310ct loose Sale price¥6,980

[12551529] Australian black opal 2.233ct loose stone Sale price¥69,800

Myanmar Violet Spinel 0.426ct Loose Sale price¥8,800

【スタッフセレクション】【KEN氏】ミャンマー産スピネル 0.482ctルース（セミオーダーメイドセッ

[Staff Selection] [Mr. KEN] Myanmar Spinel 0.482ct Loose (Semi-Custom Made Set) Sale price¥47,800

【スタッフセレクション】スリランカ産スピネル 0.445ctルース（セミオーダーメイドセッ

[Staff Selection] Sri Lankan Spinel 0.445ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

[Cat cut] Brazilian dendritic agate 0.774ct loose stone Sale price¥8,800

[Cat cut] Brazilian dendritic agate 0.744ct loose stone Sale price¥8,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.352ctルース

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.352ct Loose Stone Sale price¥39,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.341ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.341ct Loose Stone Sale price¥32,800

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.279ct Loose Stone Sale price¥22,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.232ctルース

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.232ct Loose Stone Sale price¥22,800

Australian black opal 3.027ct loose stone Sale price¥15,800

Australian black opal 0.650ct loose Sale price¥18,800

Australian Shell Opal (Shell Opal) 74.153ct Rough Stone Sale price¥29,800

Sapphire 0.461ct loose stone Sale price¥15,800

American Euperlite 50.042ct rough stone Sale price¥3,980

67.668ct rough euperlite from America Sale price¥3,980

Diamond rough stone 0.967ct Sale price¥5,980

Diamond rough stone 1.293ct Sale price¥5,980

Diamond rough stone 1.334ct Sale price¥6,980

Australian Opal 1.170ct Loose Sale price¥18,800

Australian black opal 1.107ct loose stone Sale price¥35,800

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