



























[Koshu Precious Stone Kiriko] Ametrine 3.400ct loose
Ametrine allows you to enjoy both the purple of amethyst and the yellow of citrine. Amethyst and citrine are both types of quartz (crystal), and their gemstone name is ``bicolor quartz,'' and their Japanese name is violet citrine.
This is a loose ametrine made in Koshu Takaishi Kiriko, a collaboration between Shimizu Kiseki and Yoichi Fukasawa.
Created by two masters, Mr. Yukio Shimizu, representative of Shimizu Kiseki, and Mr. Yoichi Fukasawa, representative of Jewelry Craft Fukasawa. This is Koshu precious stone cut glass . Mr. Shimizu handles the facets and Mr. Fukasawa handles the facets. Rose cut x Subaru cut 10mm.
A special patch is included.
・Type: Loose (natural stone)
・Stone name: Ametrine
・Weight: 3.400ct
・Scratch/chip: S
・Inclusion: S
·remarks:---
・Accessories: Koshu precious stone cut card, Karatz quality guarantee card (), case
▷For more information about ametrine
What kind of gemstone is ametrine? Value, care instructions, counterfeit and unheated
*We try to make sure that the colors in the photos are the same as the real thing, but the colors may look slightly different from the real thing depending on the lighting at the time of shooting and the monitor environment you are using. In addition, some photos may be taken using penlights.
*Click here for information on scratches, chips, treatments, and inclusions.
*For other frequently asked questions, please click here .
karatz_item_id: 12526397
This is a loose ametrine made in Koshu Takaishi Kiriko, a collaboration between Shimizu Kiseki and Yoichi Fukasawa.
Created by two masters, Mr. Yukio Shimizu, representative of Shimizu Kiseki, and Mr. Yoichi Fukasawa, representative of Jewelry Craft Fukasawa. This is Koshu precious stone cut glass . Mr. Shimizu handles the facets and Mr. Fukasawa handles the facets. Rose cut x Subaru cut 10mm.
A special patch is included.
・Type: Loose (natural stone)
・Stone name: Ametrine
・Weight: 3.400ct
・Scratch/chip: S
・Inclusion: S
·remarks:---
・Accessories: Koshu precious stone cut card, Karatz quality guarantee card (), case
▷For more information about ametrine
What kind of gemstone is ametrine? Value, care instructions, counterfeit and unheated
*We try to make sure that the colors in the photos are the same as the real thing, but the colors may look slightly different from the real thing depending on the lighting at the time of shooting and the monitor environment you are using. In addition, some photos may be taken using penlights.
*Click here for information on scratches, chips, treatments, and inclusions.
*For other frequently asked questions, please click here .
karatz_item_id: 12526397
Choose options



![[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems](http://store.karatz.jp/cdn/shop/files/IMG_3658.jpg?v=1781061036&width=3384)
![[On Sale June 28th, 10 PM] Brazilian Paraiba Tourmaline Gacha with Sorting Report (CuO: 2.1%, MnO: 2.2%) - Limited to 18 Stones! (Multiple Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/collage_6bc80329-36ed-4bc7-bbff-5c77e00a25bd.png?v=1782393589&width=3000)
![[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available]](http://store.karatz.jp/cdn/shop/files/31_4a872569-3259-4461-a07e-ea5bdbf13e87.png?v=1782356028&width=1000)
![[On Sale June 28th at 10 PM] Limited to 10 Stones: Brazilian Mint-Color Montebrasite (Princess Cut approx. 3.5mm) - 1 Loose Stone (Volume Discount Available)](http://store.karatz.jp/cdn/shop/files/P1010148_b8369c04-8eff-4993-89be-b2e98144c98d.jpg?v=1782382564&width=4000)

![[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_aeb10a54-ec73-4ab3-9ab2-40cc227a8bcc.png?v=1782347727&width=3000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/2026-06-2516.42.36.png?v=1782373473&width=1280)
![[On Sale June 27, 10 PM JST] "Limited to 10 Stones" Rough Stone Gacha including Paraiba Tourmaline (CuO: 1.7%+ content) and Benitoite (with a bonus Oregon Sunstone) "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/52_a5256d7b-e60a-4b76-822d-f33111c60340.png?v=1782353139&width=2268)




















![[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones](http://store.karatz.jp/cdn/shop/files/P4130575.jpg?v=1776126091&width=4000)