














2.503 ct Loose Emerald with Pyrite from Colombia
This is a pyrite-in-emerald from the Chivor Mine in Colombia. The Chivor Mine is known for producing beautiful, bluish emeralds. This particular loose stone features pyrite within the emerald. The addition of metallic-lustre pyrite to the emerald offers a different aesthetic from a plain emerald, showcasing the unique character of the mineral.
Pyrite-in-emerald such as this is known not only for its interesting appearance but also for the difficulty of its polishing. This is because emerald and pyrite have different hardnesses, with emerald being harder, so in conventional polishing, the pyrite portion tends to recede. For this reason, such stones are carefully cut over time by local craftsmen in Colombia. Because different minerals coexist within a single stone, high skill and meticulousness are required for the finishing.
・Type: Loose stone (natural stone)
・Stone name: Colombian Pyrite-in-Emerald (Colombian Emerald)
・Weight: 2.503ct
・Size: 9.3×7.1mm
・Scratches/Chips: S-A+
・Inclusions: -
・Remarks: Impregnated with a transparent agent.
*Emeralds are generally gemstones that have been impregnated with a transparent agent.
・Accessories: Karatz quality guarantee certificate, loose stone case (if it doesn't fit, a zippered clear case)
* We strive to ensure that the photos show the exact same color as the actual product, but due to lighting conditions during shooting and your monitor environment, there may be slight differences from the actual product. Also, some photos may have been 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: 12562756
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)