Mindat Logo

Bonanza Opal Workings (Virgin Opal), Virgin Valley District, Humboldt Co., Nevada, USA

Latitude: 41°50'1"N
Longitude: 119°4'38"W
The Bonanza Opal workings (Bonanza Opal Mine; Virgin Opal Mine; Bon 1-5 lodes; Defiance Mine) are a precious opal deposit and mine group, located primarily in the SW 1/4 section 6, T45N R26E, MDBM, at an elevation around 5200 feet. The patented portion of the mine is 103 acres. The early history of the Virgin Opal-Bonanza deposit is vague, but was one of the earliest claims in Virgin Valley. The original discovery of opals in the area is reported to have occurred about 1905-1906 at what is now the nearby Opal Queen Mine just S-SE of the Bonanza Mine. The Bonanza deposit was discovered, staked and became the second major location in Virgin Valley. Ivan Dow, George Mathewson, Alfred Thompson and others were the original owners (1908). The deposit was first officially reported by J.C. Merriam in 1907.
The early workings at the Bonanza were shallow surface cuts, and the tendency of the opals to craze upon exposure to atmospheric conditions after mining caused disappointment and abandonment in their early commercial mining. Some years later, after 1916, Flora Loughead (pronounced "Lockheed") acquired the Bonanza group claims, which was one of the ten major groups she owned during her mining efforts in Virgin Valley.
In January 1943 Flora Lockheed died and the Bonanza deposit was relocated on April 3, 1943, as the Virgin Opal Placer by Mark M. Foster, Frank L. Garaventa, and others, being 2,640 feet by 2,640 feet, or 160 acres. Mark Foster located a 40 acre addition measuring 2640 feet by 660 feet on July 1, 1953, known as the Virgin Opal #2 Placer, on the southerly side of the existing Virgin Opal, bringing the amount of ground claimed to 200 acres. The work consisted of a cut to begin tunnel near the north side center line of the new claim. On December 11, 1954, Mark Foster sold the Virgin Opal group placer claims (Virgin Opal & Virgin Opal #2) to the Hodson family. The Virgin Opal claims were downplayed in their importance by their new owners to discourage highgrading due to the remoteness of the location and the valuable nature of the gems in the exposed deposits, and in literature was purported to "be only a localized enrichment" (Eyles, 1964, p.122), which was not the actual case.

In 1973, while working on the Virgin Opal claim, Keith Hodson accidentally discovered the 7.25 pound "Bonanza" Opal, which was broken into 5 large pieces and numerous smaller chunks by the bulldoer blade. During 1974-1975, the United States Geological Survey examined the Virgin Opal-Bonanza deposit (among other mines in the area) as part of their study of the mineral potential of Virgin Valley and the Sheldon Range (U.S.G.S., 1984, p.1,131-134). On June 15, 1979, Keith Hodson located the Bon #1-5 Lode mining claims over his existing Virgin Opal Group placers and filed a patent application. A mineral survey was conducted on the Bon #1-5 lode claims between June 25-28, 1979. On September 7, 1982, Keith Hodson received a mineral patent to the Bon #1-5 lode claims, patent # 27-82-0024, covering 103.305 acres. The mine was worked for many years by owner Keith Hodson, and in the early 1980's produced a 3,853 carat limb replacement precious opal discovered by Hodson's wife, Agnes, known as the "Crowning Glory" which was valued at $50,000.00 (USA) as a wet specimen. On July 15, 1988, Keith Hodson (dba Rainbow Ridge Opal Mines Inc) sold the patented Bon #1-5 lode mining claims ("Bonanza Opal Mine") to Richard Leger and Lloyd Olds, who in turn formed a limited partnership selling 1% digging right shares in the mine. Initially the shares sold for $6,000.00 each, and averaged $9,000.00 or so in later years. On September 15, 1989, Richard Leger and Lloyd Olds filed the Virgin Opal #1 and #1A placer claims, claiming ground on either side of and buffering the patented Bonanza Opal mine. On October 22, 1991, the Bonanza shareholder partnership formed Bonanza Opal Mines, Inc., a Nevada corporation. On July 9, 1992, Lloyd Olds and Richard Leger quitclaimeed their interests in the Virgin Opal #1 and #1A placers to the Bonanza corporation, as well as the patented mine. The Virgin Opal placer claims on either side of the patented Bonanza Opal mine were apparently so valuable that Lloyd Olds stipulated in the deed that the claims were to remain with Bonanza Opal Mines Inc forever or be returned to him upon dissolution of the corporation. The corporation subsequently filed buffer lode claims on both sides of the patented mine.
For some time afterwards, the Bonanza corporation and shareholders were involved in lawsuits over management, ownership and share disputes, among other issues. However, after initiating a shareholder plan for the patented mine, considerable amounts of precious opal was recovered, of which 1/2 went to the corporation and 1/2 to the discovering shareholder; exceptional specimens remained property of the corporation. After legalities were settled, the tailings portion of the mine was open for public fee digging.

The Virgin Opal-Bonanza deposit is underlain by in-place, nearly horizontal to 45 degree dipping ash, tuff, and tuffaceous sandstone beds. The opal bearing horizon can generally be traced and averages more than 4 feet (1.2 m) thick and consists primarily of light colored bentonite containing varying amounts of petrified wood, rhyolite pebbles, ash, and opal. Precious opals are usually found in the upper half of the horizon. The Bonanza mine is quite developed and active, with many large trenches, open cuts, pits and workings. The original float (placer) deposits are exhausted; the lode deposit is being actively mined. The mine has produced large precious opals, the most noteworthy weighing 7.25 pounds ("The Bonanza Opal"); 8 pounds ("Irene's Delight"); and other smaller pieces too numerous to mention. Bonanza Opal Mines Inc., sales for 1995 totaled $47,566 (11/30/1995) and the patented mine yielded a total of 79 gallons of opal from the 1995 season (the corporation's 50% share was 49 gallons of opal, or approximately ten 5-gallon buckets, which was considered to be a "bad" season). Heylmun (1987, p.44) notes that "In places, precious opal has been involved with slumping and landsliding; undoubtedbly, some valuable opal deposits lie buried beneath the landslides." The Virgin Opal-Bonanza deposit was noted as being one of several mines in Virgin Valley having opal reserves worth millions of dollars (USGS, 1984, p.7). The patented mine, along with the other adjoining claims, transferred by Lloyd Olds and Richard Leger to the Bonanza Corporation, were estimated to be worth not less than $5,000,000.00 (five million dollars USA) in 1987 and 1994 (Defendants, 1996). The Bonanza dposit has also been noted as being one of the two most important mines in the area (Zeitner, 1986 p.44).

Mineral List

Opal
Opal
var: Precious Opal

'Petrified Wood'


3 entries listed. 1 valid mineral.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

USGS Bull 1538D
Rocks & Min. 13:56.

Bonanza Opal Mines, Inc., (10/14/1994) Opal Production, 1995 Season, memo dated 10/14/1995 by Marge Golden, Treasurer.

Bonanza Opal Mines, Inc., (11/30/1995) Financial Statement; unsigned.

Bonanza Opal Mines, Inc., (1996) Pay Dirt Newsletter of the Bonanza Opal Mines Inc., January 1996; Editors Jean & John Emerson.

Defendants (1996) Defendants/Counterplaintiffs' trial statement filed 10/08/1996 (Docket#113), at page 6 lines 22-24, case of BONANZA OPAL MINES INC. VS. RICHARD LEGER, ET AL., #cv-94-07927, Second Jud. Dist. Court, Washoe Co, (Reno, NV);

Eckert, Allan W. (1997) The World of Opals. John Wiley & Sons, NY.

Eyles, W.C. (1964) The Book of Opals. Charles E. Tuttle, Rutland VT.

Helymun, E.B. (1987) Virgin Valley. Lapidary Journal Magz., 41:3, p33-44.

U.S.G.S. (1984) Mineral Resources of the Charles Sheldon Wilderness Study Area, Humboldt and Washoe Counties, Nevada, and Lake and Harney Counties, Oregon. United States Geological Survey Bulletin 1538. U.S. Gov't Printing Office, Washington DC, and USGS (also referred to by some as the "Cathrall et al report".

Wentzell, Christopher, personal collection of mining records and historical documents pertaining to the Virgin Valley Mining District, Humboldt County, NV.

Zeitner, June C. (1986) Precious Opal in the United States. Lapidary Journal, 40:3, p. 42-48, p. 44.

External Links

http://www.bonanzaopals.com/ - Bonanza Opal Mine website

This page is currently not sponsored. To sponsor this page click here.


Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: August 30, 2014 04:16:52 Page generated: May 12, 2012 00:06:03
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds