Birthstone list

Tanzanian pink tourmaline 0.558ct loose stone Sale price¥12,800

Mozambique Rubellite 0.410ct Loose Stone Sale price¥15,800

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥19,800

Namibian Green Tourmaline 7.0mm/1.206ct Loose Stone (Lagoon Tourmaline) Sale price¥59,800

[Mr. KEN] Mexican Opal 0.981ct Loose Sale price¥49,800

[Mr. KEN] Tanzanian Golden Sheen Sapphire 3.2mm/0.230ct Loose Sale price¥9,800

[Mr. KEN] Tanzanian Golden Sheen Sapphire 3mm/0.161ct Loose Sale price¥6,980

[Mr. KEN] Tanzanian Golden Sheen Sapphire 3.8mm/0.301ct Loose Sale price¥13,800

[Mr. KEN] Tanzanian Golden Sheen Sapphire 3.7mm/0.277ct Loose Sale price¥9,800

[Mr. KEN] Tanzanian Golden Sheen Sapphire 3.6mm/0.268ct Loose Sale price¥9,800

[Mr. KEN] 0.191ct loose golden sheen sapphire from Tanzania Sale price¥8,800

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） 0.838ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/0.838ct Loose Stone 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） 1.030ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.2mm/1.030ct loose stone Sale price¥15,800

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） 1.087ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/1.087ct loose stone Sale price¥16,800

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） 0.826ctルース

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose 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） 0.810ctルース

[Yurakucho Marui 2024112 take-out] [Yurakucho Marui 202411 request withdrawn] Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/0.810ct loose stone Sale price¥18,800

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） 0.971ctルース

《Yurakucho Marui 2024112 Take-out》【Yurakucho Marui 202411 Request Withdrawn】Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.2mm/0.971ct Loose Stone Sale price¥15,800

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） 2.080ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 2.080ct loose stone Sale price¥16,800

Silky pink sapphire from Vietnam 3.2mm/0.175ct loose stone Sale price¥6,980

Silky pink sapphire from Vietnam 0.198ct loose stone Sale price¥6,980

Demantoid garnet from Madagascar 0.056ct loose Sale price¥8,800

Demantoid garnet from Madagascar 0.063ct loose Sale price¥8,800

Demantoid garnet from Madagascar 0.057ct loose Sale price¥9,800

[Koshu Precious Stones plusthree] Ametrine 7.238ct loose stone with patch Sale price¥39,800

[Sakura Incut] YAG (Yttrium Aluminum Garnet) 9mm/3.410ct Loose Sale price¥55,800

Blue watermelon tourmaline 2.380ct loose Sale price¥15,800

Blue watermelon tourmaline 6.815ct loose Sale price¥49,800

Colombian emerald cat's eye 0.138ct loose Sale price¥17,800

《Yurakucho Marui 2024112 takeout》Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000

Andesine Labradorite (also known as Rainbow Moonstone) 1.373ct loose stone Sale price¥12,800

Amethyst 4.249ct rough stone Sale price¥9,800

Unheated Brazilian Paraiba Tourmaline 0.081ct loose stone (CuO: 2.1%, MnO: 2.3%) Sale price¥98,000

Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%) Sale price¥98,000

Unheated Brazilian Paraiba Tourmaline 0.059ct loose stone (CuO: 1.4%, MnO: 2.7%) Sale price¥63,800

Unheated Brazilian Paraiba Tourmaline 0.069ct loose stone (CuO: 1.6%, MnO: 2.6%) Sale price¥79,800

Unheated Brazilian Paraiba Tourmaline 0.065ct loose stone (CuO: 2.0%, MnO: 2.4%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.066ct loose stone (CuO: 1.5%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.063ct loose stone (CuO: 1.8%, MnO: 2.4%) Sale price¥75,800

Unheated Brazilian Paraiba Tourmaline 0.061ct loose stone (CuO: 1.7%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.055ct loose stone (CuO: 1.9%, MnO: 2.2%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.066ct loose stone (CuO: 1.7%, MnO: 2.4%) Sale price¥79,800

Unheated Brazilian Paraiba Tourmaline 0.056ct loose stone (CuO: 1.7%, MnO: 2.3%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.062ct loose stone (CuO: 1.7%, MnO: 2.5%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.058ct loose stone (CuO: 2.0%, MnO: 2.2%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.056ct loose stone (CuO: 2.1%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.057ct loose stone (CuO: 1.6%, MnO: 2.4%) Sale price¥69,800

Pink tourmaline 0.692ct loose stone Sale price¥18,800

Pink tourmaline 0.845ct loose stone Sale price¥14,800

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