Where is Nasarawa?
Nasarawa State lies in central Nigeria. Readers consulting older gemmological literature will encounter a historical complication: the 1996 Journal of Gemmology article describes Nasarawa Eggon under Plateau State. Nasarawa State was created from part of Plateau State in October 1996, so the older description reflects the administrative map at the time of research and publication rather than the modern state boundary. Nasarawa State Government
Kwafam Gwari: the clearest historic emerald reference
Schwarz, Kanis and Kinnaird's 1996 research records gem-quality aquamarines from Sabon Wana and Tundun Delli in the Nasarawa Eggon area and states specifically that emeralds are known from Kwafam Gwari. Schwarz, Kanis & Kinnaird, 1996
This makes Kwafam Gwari particularly valuable for provenance writing: unlike a vague “central Nigeria” attribution, it is a named locality linked explicitly with emerald in specialist literature.
However, the paper does not provide a modern concession registry or prove that every stone now sold under the Nasarawa name originated there. NigerianEmeralds.com should therefore preserve the distinction between published locality evidence and the provenance of an individual commercial stone.
The 2024 Nasarawa Eggon find
In spring 2025, GIA reported on material said to come from a new 2024 find at the Nasarawa Eggon mine. The examined crystals showed strong colour zoning, with greener bands concentrated near parts of the crystals. Chemical testing found iron plus traces of vanadium and chromium in those green zones, while near-colourless portions were dominated by trace iron. GIA, New Nigerian Green Beryl Find
GIA's title and varietal identification are significant: it called the material green beryl, not emerald. This provides an excellent real-world demonstration of why the words “green”, “chromium-bearing”, “vanadium-bearing” and “emerald” are not automatically interchangeable.
Nasarawa's wider beryl geology
Nasarawa sits within the broader central Nigerian gem-pegmatite province discussed in the 1996 study. Strongly albitised pegmatites around Wamba and Akwanga, for example, contain beryl together with tourmaline, cassiterite, garnet, apatite and other minerals. Schwarz, Kanis & Kinnaird, 1996
These sites are useful geological context but should not automatically be labelled “emerald mines”. Beryl is a mineral species that includes emerald, aquamarine and other varieties, and the presence of beryl alone is not evidence of commercially significant emerald.
What does Nasarawa material look like?
There is no single Nasarawa colour. Published Nigerian beryls range from relatively pale green and greenish blue to more saturated green material. Strong growth zoning is also characteristic of some Nigerian material, and the 2024 GIA specimens show how green colour can be concentrated into relatively narrow zones rather than distributed uniformly through a crystal.
This has practical consequences for cutters. A rough crystal that looks richly coloured from one end or when several stones are grouped together may produce a substantially lighter finished gemstone if the strongest colour occupies only a small part of the rough.
How should a Nasarawa emerald be described for sale?
A responsible product listing should separate what is known from what is reported.
| Evidence available | Recommended wording |
|---|---|
| Independent laboratory report giving Nigeria | “Origin: Nigeria — laboratory opinion” |
| Reliable supplier documentation says Nasarawa | “Reported locality: Nasarawa State, Nigeria — supplier provenance” |
| Exact locality supplied as Nasarawa Eggon but not independently tested | “Reported source: Nasarawa Eggon, Nigeria; locality not independently verified” |
| No documentary chain beyond seller assertion | “Reported Nigerian origin; independent locality confirmation unavailable” |
GIA explains that geographic-origin determination depends on reliable reference collections, microscopy and analytical data and is properly reported as an expert opinion. GIA, Geographic Origin Dilemma
Why Nasarawa matters
Nasarawa offers something particularly interesting for collectors because it demonstrates the breadth of the Nigerian beryl family within one broad region: aquamarine localities, documented historic emerald and recently characterised green beryl all occur in the literature.
That complexity is more valuable than a simplistic claim that everything green from Nasarawa is emerald. For NigerianEmeralds.com, accurate classification should be part of the provenance story, not an obstacle to it.