The Van Roi occurrence is situated southwest of the junction of Maurier and Silverton creeks, in the Slocan Mining Division. The underground workings are on the Mackinaw and Mountain Boomer Crown grants (Lots 6528 and 740).

The original claims were staked in 1892 and the initial production of ore was in 1893 from the Mountain Boomer claim. The Vancouver group, comprised of the Vancouver, Mountain Boomer, Le Roi, Iowa, and Poona claims, was operated from 1896 to 1907. In 1908 the Vancouver was acquired by the Van Roi Mining Co., an English syndicate, and operations continued until 1914.

The Van Roi and Hewitt (082FNW065) properties were acquired by C. Cunningham, of Sandon, in 1917 and intermittent mining operations were carried out under the name of Cunningham Mines Ltd. until 1927. Leasers worked the property the following two years and then it was reported to have been acquired by Amalgamated Mines Ltd. of Vancouver. That same year (1929) Van Roi Mines Ltd. took over the property and operated it intermittently until 1931. Helena Gold Vines Ltd. acquired the property in 1933 but did not open the mine.

In 1942 International Metals Inc. Ltd. began to rehabilitate the mine but abandoned the project before it was completed. The Granby Co. Ltd. did some rehabilitation work on the property in 1946.

Van Roi Mines (1947) Ltd. reopened the mine and operated it for two years. In 1950 the Van Roi Consolidated Mines Ltd. was formed to operate the Van Roi and Hewitt properties. Controlling interest in this company was held by Transcontinental Resources Ltd. Options on the Galena Farm (082FNW067) and Metallic (082FNW066) properties were held for one year. In 1954 the company was reorganized under the name of Slocan Van Roi Mines Ltd. and leasers operated the mine until it was closed in 1957. The name of this company was changed to Kopan Developments Ltd. in 196O.

The property is developed on 9 levels, the workings following the fault zone for nearly 914 metres and to a depth of about 366 metres. To the west the same zone has been explored by the Hewitt mine and possibly it continues to the shore of Slocan Lake in the vicinity of the Galena Farm mine.

In December 1970 Kopan Developments Limited entered into a joint venture agreement with Arjan Pacific Ltd. Geological mapping was carried out in 1971. Arjan Pacific in 1973 acquired title to 43 Crown-grants covering the Van Roi and Hewitt properties.

In 1987 and 1989, PBX Resources Ltd. surveyed the property. The CDO showing lies 450 metres southeast of the Van Roi veins. The Wedge showing lies on the Le Roi claim, 800 metres east of the Van Roi veins. Adits and trenches occur at both of these showings.

Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by very fine grained clastic sedimentary rocks of the Upper Triassic Slocan Group that include locally weakly metamorphosed argillite, quartzite, limestone and some tuffaceous rocks. These sedimentary rocks are intruded by dikes, sills and stocks of varied composition and origin. Permian and/or Triassic Kaslo Group metamorphosed volcanic rocks occur to the north of the Slocan Group rocks. Middle Jurassic Nelson intrusions are immediately south of the Slocan Group and are inferred to be the source of granitic to pegmatitic sills and dikes found in the area. The Nelson intrusions comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite (Paper 1989-5).

The Van Roi occurrence is hosted by quartzite, calcareous quartzite and argillites of the Slocan Group that strike 140 degrees and dip 73 degrees northwest. The occurrence is just north of the contact with the Nelson intrusions and the sedimentary sequence has been affected by contact metamorphism from the emplacement of the nearby intrusions. The quartzite generally contains epidote and the argillite beds are bleached and silicified. Near the occurrence the Nelson intrusions are composed of medium-grained granodiorite and quartz diorite. A few mafic and felsic dikes and sills, some up to 15 metres wide, cut the sedimentary rocks in the mine.

The Van Roi deposit is hosted by a zone of faulting and shearing with oblique normal-sinistral movement. The zone averages 35 metres in thickness, strikes 070 to 075 degrees and dips 75 degrees northwest. It has been explored in seven adits covering 900 metres of strike length and 365 metres vertically. The structure probably correlates with the North vein on the Hewitt property (082FNW065) and may extend as far west as the Galena Farm property (082FNW067).

The shear zone hosts two main veins and numerous, less important ones. The Main or North vein is parallel to the shear structure. It has been developed on all the underground levels. The South or Beryl vein is present in the western part of the mine and exposed on levels 3 to 5. The South vein strikes 050 to 060 degrees and dips 65 to 75 degrees northwest. A number of orebodies are scattered at irregular intervals along both vein systems. The ore shoots generally plunge about 55 degrees to the west. Most of the ore was mined from shoots that were 30 to 60 metres long and 1 to 3 metres thick. Most shoots occurred between levels 2 and 5 of the mine. All ore shoots were similar and consisted of lenses and veins of massive galena and sphalerite, commonly associated with brecciated zones with fragments of ore and hostrocks cemented by quartz, siderite and calcite. The high grade portions of the ore shoots locally carried tetrahedrite, pyrargyrite and some native silver. Pyrite and chalcopyrite were common accessory minerals.

In general, the boundaries of the ore zones were determined by the limits of commercial values rather than a structural break. However, in the western part of the mine the Main vein was terminated against a southeast striking fault zone. West of the fault the North vein could not be located but lateral displacement was probably not great because the Hewitt North vein lies almost directly on strike with the termination of the Van Roi North vein.

Production from the Van Roi mine between 1893 and 1958 yielded about 86 tonnes of silver, 8091 tonnes of lead, 7600 tonnes of zinc, 16 tonnes of cadmium and 9 kilograms of gold from 284,706 tonnes mined.

Klondike Gold Corp. acquired the Van Roi and Hewitt mines in December 1999.

In 2009, Klondike Silver Corp. completed a program of prospecting, geological mapping, ground geophysical surveys, trenching and four diamond drill holes, totalling 480 metres on the area.