























Euclase with pyrite from Colombia 23.430ct Rough, Hōki Kyōso
Euclase gets its name from the Greek words "eu" meaning "well" and "klasis" meaning "to break," and true to its name, it exhibits perfect cleavage. As it is a rare species, among other factors, euclase is a rare stone that is rarely made into a gemstone. It comes in color variations such as white, colorless, pale green, pale blue, and deep blue.
This specimen is a symbiotic type of euclase accompanied by pyrite. The combination of translucent euclase and metallic pyrite creates a striking contrast where different textures are integrated.
Euclase is known as a mineral with strong cleavage, making it difficult to process. Therefore, rough stones that can be enjoyed in their natural crystalline state are highly collectible. The symbiosis with pyrite adds another appeal, offering an "interesting aspect as a specimen" that differs from a single mineral.
It comes with a sorting report from the Gemological Association of Japan.
・Type: Rough stone
・Stone name: Euclase with pyrite from Colombia
・Weight: 23.430ct
・Size: 20.2×17.9mm
・Scratches/Chips: -
・Inclusions: -
・Remarks: ---
・Accessories: Sorting report (Gemological Association of Japan), Karatz quality guarantee, loose stone case (if it doesn't fit, a zippered clear case)
* We strive to ensure that the photos show the same colors as the actual product, but due to lighting conditions during photography or your monitor environment, the actual product may appear slightly different. Also, some photos may be taken using a penlight.
* For information on scratches, chips, treatments, and inclusions, please refer to here.
* For other frequently asked questions, please refer to here.
karatz_item_id: 12562829
Choose options




![[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/collage_68f24c59-ad99-43b4-bb8f-f7560aa7f246.png?v=1792134404&width=2000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/2026-10-1615.44.21.png?v=1792133085&width=1249)

![[10/22, 10:00 PM Sale] <limited to stones> Sky Blue Topaz (Round approx. 8mm, only one stone is approx. 10mm) <multiple purchase discount available></multiple></limited>](http://store.karatz.jp/cdn/shop/files/PA050720_0c803cec-809e-4351-8ed4-19b5405d1e2a.jpg?v=1791592314&width=4000)




![[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/P9098894_9e71d12f-afda-46cb-99c2-1c15650319a3.jpg?v=1791805575&width=3070)

![[Deadline: Sat, Oct 3, 10 AM: Lottery Sale ①_07] Internally Flawless Diamond (H&C) 0.320ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified](http://store.karatz.jp/cdn/shop/files/collage_c5a7826b-52bb-4208-b21b-dd0864ce4929.png?v=1790579363&width=2000)
![[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_02] Diamond (H&C) 4.3mm/0.318ct Loose Stone (H, SI-1, 3Excellent H&C) with CGL Certificate & Sarine Light Report](http://store.karatz.jp/cdn/shop/files/collage_7de5fb5b-0545-4b3f-ad81-43e23de482f7.png?v=1790579155&width=2000)












![[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)


![[Jeweler's Tools] Color change penlight loose set](http://store.karatz.jp/cdn/shop/files/P1010673_2976de1d-08ce-4d92-94af-524da4485c99.jpg?v=1725605083&width=4000)