My visit to the Crater of Diamonds State Park
I had long dreamed of visiting the Crater of Diamonds state park in Murfreesboro, Arkansas. This is the only diamond search area in the world open to the public AND where you can keep what you find. It seemed like a modern day treasure hunt.
I arrived to the crater bright eyed and eager, just like so many other visitors. I truly believed that I would be one of the lucky ones and that I would find a large diamond. Initially I dreamed of finding a large diamond to cut and sell (diamonds have the most value after they have been cut) but after arriving to the park I decided that I would keep my raw diamond uncut and have it set as a piece of jewelry. As the park lets you name any diamond found weighing at least two carats, I even started picking out diamond names!
The land was owned and mined by two or three different families near the turn of the century and roughly 40,000 diamonds were mined from the soil. Much later, in the 1970s, the land was purchased by the state of Arkansas and later opened as a state park.
Since visiting the park and learning more about its history AND after spending three full days there, my opinion is that the land is very picked over and a high percentage of the diamonds have been long mined away. That being said, there *are* diamonds to be found. Most of the diamonds found at the park are rather small, and are well under 1/2 a carat.
In order to find a diamond, I suppose one has to be lucky enough to start digging in just the right spot and the right depth. The search area is 37.5 acres, so I will do some math:
37.5 acres = 1,633,500 square feet
Average size hole, from what I saw at the park, was about 2.5 feet square.
In 2014, a total of 585 diamonds were found. (FYI, of those, 17 of those were over 1 carat)
2.5 square feet (average size hole) divided by 1,633,500 square feet (total search area) = 0.0000015
0.0000015 x 585 = 0.0008775
So the odds of finding a diamond, based on randomly selecting one patch of ground and digging are 0.08775%. So less than 1%.
The odds of finding a diamond over one carat in size are worse, obviously.
You may be wondering what uncut diamonds (diamonds “in the rough”) look like. Here they are, below: (photo from Crater of Diamonds website)
The diamond colors seen at the park are white, yellow, and brown. It is worth noting that any diamond can expect to lose 1/2 of its carat weight after cutting.
Here is a typical detail photo showing the surface area of the search field. This photo was taken after hours of heavy downpour the evening before. The heavy rains have washed away quite a bit of dirt and clay from the surface, leaving the tops of rocks and minerals exposed. The conditions were perfect for encountering a rogue diamond – and yet none were found by any park visitor that day.
This picture shows some of the equipment I used. The buckets, shovels, hand trowels, and sifting screens were provided by the Diamond Oaks Inn Bed and Breakfast where I stayed. The wagon I rented my first day at the park to make carting the gear across the crater easier.
Here I am, digging in the dirt and trying my luck.
There are two wash basin areas at the park where visitors can wet sift. After collecting a bucket or two of dirt / mud, wet sifting is done using two screens – a coarse and a fine mesh screen. Sifting can also be done dry, but on the days I was at the park the dirt was too moist.
Every day the park staff keep an updated tally of all the diamonds found by park visitors that day. They are listed by color and size. Points are not the same as carats. 1 point is one-hundredth of a carat. 100 points is a carat.
I did better than most visitors to the park, in that I didn’t go home empty handed. This nice size piece of amethyst I found in the morning of day 2 at the park. It had rained very hard the night before and I was surface searching for diamonds. I saw a large shiny surface exposed from a ledge of dirt and pulled out this amethyst. It is interesting to me that the crystals are very damaged – I suspect from decades of incidental hitting from shovels as park visitors searched for diamonds.