New stock

South African diamond rough (sawable) 0.110ct rough Sale price¥25,800

South African diamond rough (sawable) 0.091ct rough Sale price¥22,800

South African diamond rough (sawable) 0.085ct rough Sale price¥19,800

Madagascar Blue Sapphire 0.316ct Loose Sale price¥18,800

Madagascar Blue Sapphire 0.401ct Loose Sale price¥14,800

《Yurakucho Marui 2024112 takeout》Madagascar blue sapphire 0.490ct loose stone Sale price¥18,800

0.735ct Madagascar Purple Sapphire Loose Stone Sale price¥35,800

Madagascar sapphire 0.448ct loose stone Sale price¥19,800

Madagascar Purple Sapphire 0.349ct Loose Stone Sale price¥18,800

Russian White Topaz 6.255ct Loose Sale price¥12,800

Pakistani Oil in Quartz 4.776ct Loose Stone (Moving Bubbles) Sale price¥12,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 1.259ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.259ct loose stone Sale price¥15,800

《Yurakucho Marui 2024112 takeout》Sri Lankan chrysoberyl cat's eye 1.169ct loose stone Sale price¥28,800

Brazilian Indigolite Tourmaline 7.002ct Loose Stone, Japan-Germany Exchange Sale price¥198,000

[Staff Selection] Myanmar Pink Spinel 0.305ct Loose (Semi-Custom Made Set) Sale price¥52,800

【スタッフセレクション】タンザニア産カラーチェンジコバルトスピネル 0.249ctルース（セミオーダーメイドセッ

[Staff Selection] Tanzania Color Change Cobalt Spinel 0.249ct Loose Stone (Semi-Custom Made Set) Sale price¥74,800

【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】ダイヤモンド 0.063ctルース（VSクラス相当）（セミオーダーメイドセッ

[Staff Selection] Diamond 0.063ct loose stone (equivalent to VS class) (semi-custom set) Sale price¥47,800

【スタッフセレクション】タンザニア産タンザナイト 0.262ctルース（セミオーダーメイドセッ

[Staff Selection] Tanzanite 0.262ct loose stone from Tanzania (semi-custom made set) Sale price¥74,800

【スタッフセレクション】【KEN氏】タンザニア産グリーンサファイア 0.258ctルース（セミオーダーメイドセッ

[Staff Selection] [Mr. KEN] Tanzanian Green Sapphire 0.258ct 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

【スタッフセレクション】【KEN氏】タンザニア産ピンクトルマリン 0.290ctルース（セミオーダーメイドセッ

[Staff Selection] [Mr. KEN] Tanzanian Pink Tourmaline 0.290ct Loose (Semi-Custom Made Set) Sale price¥74,800

【スタッフセレクション】【KEN氏】タンザニア産オレンジジルコン 0.650ctルース（セミオーダーメイドセッ

[Staff Selection] [Mr. KEN] Tanzanian orange zircon 0.650ct loose stone (semi-custom made set) Sale price¥47,800

【スタッフセレクション】マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.450ctルース（セミオーダーメイドセッ

[Staff Selection] Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.450ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

[Staff Selection] Brazilian Santa Maria Aquamarine 5.1mm/0.523ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

[Staff Selection] Brazilian Green Tourmaline 0.475ct Loose (Semi-Custom Made Set) Sale price¥47,800

[Staff Selection] [Mr. KEN] Tanzanian Iolite 5.5mm/0.589ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Diamond (cabochon cut) 0.206ct loose Sale price¥55,800

Brazilian alexandrite 0.120ct loose Sale price¥15,800

Brazilian alexandrite 0.123ct loose Sale price¥15,800

Brazilian Alexandrite 0.106ct Loose Stone (Silky Alexandrite) Sale price¥15,800

Brazilian alexandrite 0.116ct loose Sale price¥15,800

Brazilian Alexandrite 0.141ct Loose Stone (Silky Alexandrite) Sale price¥15,800

Bekily Blue Garnet (color change garnet) 0.114ct loose Sale price¥11,800

Bekiri Blue Garnet (Color Change Garnet) 0.106ct Loose Stone Sale price¥9,800

Australian Rainbow Lattice Sunstone 1.746ct Loose Stone Sale price¥15,800

Unheated Brazilian Paraiba Tourmaline 0.072ct loose stone (CuO: 1.8%, MnO: 2.3%) Sale price¥69,800

[On sale from 10/2 at 10pm] Unheated Brazilian Paraiba Tourmaline 0.069ct loose stone (CuO: 2.1%, MnO: 2.1%) Sale price¥88,800

Unheated Brazilian Paraiba Tourmaline 0.052ct loose stone (CuO: 2.0%, MnO: 2.2%) Sale price¥55,800

非加熱ブラジル産パライバトルマリン 0.051ctルース（CuO:1.9%、MnO:2.5%）

Unheated Brazilian Paraiba Tourmaline 0.051ct loose stone (CuO: 1.9%, MnO: 2.5%) Sale price¥55,800

《Yurakucho Marui 2024112 Takeout》Namibian Jeremejevite 0.501ct loose stone (bicolor) Sale price¥98,000

Sri Lankan Chrysoberyl Cat's Eye 0.531ct Loose Stone Sale price¥19,800

Sri Lankan Chrysoberyl Cat's Eye 0.556ct Loose Stone Sale price¥15,800

Sky blue topaz 1.719ct loose stone Sale price¥9,800

Ethiopian Opal 0.788ct Loose (Sphere) Sale price¥7,980

Ethiopian Opal 0.629ct Loose (Sphere) Sale price¥7,980

《Yurakucho Marui 2024112 takeout》2.251ct Santa Maria aquamarine loose stone from Madagascar Sale price¥29,800

Spessartite Garnet from Madagascar 1.053ct loose stone Sale price¥29,800

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