Birthstone list

[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

《Yurakucho Marui 2024112 takeout》Russian yellow diamond rough (sawable) 0.306ct rough (trigon) Sale price¥98,000

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

Limited to 3 stones: YAG (yttrium aluminum garnet) 1 loose stone (canary yellow, 3mm) Multiple purchase discounts available Sale price¥1,980

Limited to 18 stones: YAG (Yttrium Aluminum Garnet) 1 loose stone (Canary Yellow, 4mm) Multiple purchase discounts available Sale price¥2,980

Limited to 7 stones: 1 loose Australian boulder opal (average 25 carats) Multiple purchase discounts available Sale price¥8,800

Brazilian emerald 1844ct rough stone Sale price¥39,800

《Yurakucho Marui 2024112 takeout》 Padparadscha sapphire 0.548ct loose DGL Sale price¥49,800

《Yurakucho Marui 2024112 takeout》【10/2 22:00 sale】Diamond 0.171ct loose (E, VS2) Sale price¥35,800

《Yurakucho Marui 2024112 takeout》【10/2 22:00 sale】Diamond 2.7mm/0.074ct loose (D, SI1) Sale price¥19,800

《Yurakucho Marui 2024112 takeout》K18PG unheated Brazilian Paraiba tourmaline 0.10ct ring AIGS Sale price¥228,000

《Yurakucho Marui 2024112 takeout》K18YG Madagascar Padparadscha Sapphire 0.372ct Ruby Pendant (Necklace) Medium Treasure Mirror Sale price¥69,800

《Yurakucho Marui 2024112 takeout》K18YG Brazilian Paraiba Tourmaline 0.30ct Diamond Ring GIA Sale price¥198,000

《Yurakucho Marui 2024112 Takeout》K18YG Unheated Padparadscha Sapphire 0.61ct, Ruby, Blue Sapphire Ring GIA Sale price¥198,000

"Yurakucho Marui 2024112" Pt950 Brazilian Paraiba Tourmaline 0.201ct Pendant (Necklace) Sale price¥128,000

《Yurakucho Marui 2024112 takeout》K18PG Sri Lankan yellow sapphire 0.31ct green garnet ring Sale price¥89,800

《Yurakucho Marui 2024112 take-out》K18PG American benitoite 0.19ct tanzanite ring Sale price¥98,000

《Yurakucho Marui 2024112》K18YG Pink Diamond 0.068ct Ring (FANCY LIGHT PINK, SI-2) Sale price¥128,000

《Yurakucho Marui 2024112 takeout》K18YG Brazilian Paraiba Tourmaline 0.203ct Pink Diamond Ring Sale price¥98,000

Brazilian Imperial Topaz 0.377ct Loose Stone Sale price¥14,800

Tourmaline 0.541ct loose stone Sale price¥8,800

Brazilian Tourmaline 0.858ct Loose Stone Sale price¥15,800

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

Brazilian Pink Tourmaline 0.538ct Loose Stone Sale price¥8,800

Brazilian pink tourmaline 0.844ct loose stone Sale price¥22,800

Brazilian Pink Tourmaline 0.855ct Loose Stone Sale price¥14,800

Brazilian Swiss Blue Topaz 2.449ct Loose Stone Sale price¥12,800

Brazilian Sky Blue Topaz 5.246ct Loose Stone Sale price¥18,800

《Yurakucho Marui 2024112 takeout》Brazilian Sky Blue Topaz 1.604ct Loose Sale price¥9,800

Brazilian Brown Tourmaline 1.529ct Loose Stone Sale price¥14,800

Brazilian Green Tourmaline 1.166ct Loose Stone Sale price¥19,800

Brazilian Green Tourmaline 1.059ct Loose Stone Sale price¥16,800

Brazilian pink tourmaline 0.711ct loose stone Sale price¥15,800

Brazilian Pink Tourmaline 0.628ct Loose Stone Sale price¥15,800

Brazilian Green Tourmaline 0.350ct Loose Sale price¥9,800

[Published in 22602357] K18 mint garnet 0.513ct ring Sale price¥79,800

[On sale from 10/4 at 10pm] Pt950 pink diamond 0.047ct diamond ring (FANCY LIGHT PURPLE PINK/SI-1/NONE) Sale price¥98,000

[On sale 10/2 at 10pm] Brazilian emerald 3mm/0.090ct loose stone Sale price¥15,800

Mozambique Rubellite 4.081ct Loose Stone Sale price¥98,000

Brazilian oil-free emerald 0.100ct loose stone GIA Sale price¥79,800

Brazilian oil-free emerald 0.080ct loose stone GIA Sale price¥69,800

モザンビーク産エルバイトトルマリン 1.160ctルース（CuO:0.1%,MnO:2.3%）

Elbaite tourmaline from Mozambique 1.160ct loose stone (CuO: 0.1%, MnO: 2.3%) Sale price¥55,800

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