The ore body dips about 45 degrees east and measures roughly 600 by 150 by 150 meters. North striking faults slice the orebody into a number of massive blocks while well developed systems of conjugate joints contain the long cross fiber chrysotile or asbestos. Most veins are the 2 fiber type with a central parting. The short asbestos component is also economically significant. The orebody is underlain by 4 major thrust sheets comprized of Devonian to Triassic greenstones, argillites, limestones and ultramafic bodies of serpentinite.
Magnetite is abundant along vein walls as is pyrite and some jade.
The jade occurs along a fault zone between serpentinite and an alteration band of rodingite developed along argillite hanging-wall rocks. This garnet imparts a brighter, emerald-green colour to Cassiar jade dispersed within the nephrite matrix. This brightness is desirable in most jade markets and makes Cassiar jade stand out. The association of jade with ultramafic bodies and faults is well recognized and still presents viable exploration targets. Typical associated minerals include talc, soapstone, tremolite, actinolite and bowenite.