From depositto delivery.
Five stages across two Idaho sites. Crushed, screened and milled. Never burned, nothing added.
Five stages take the stone from the bench at Darlington to the truck. Every one of them is mechanical: crushed, screened and milled. Nothing burned, nothing added.

Two Idaho sites. Darlington holds the deposit, the crushers and the screens. Gooding holds the mill. One operation, one source, every grade.
About US CalciumExtractionDarlington, Idaho
CrushingDarlington, Idaho
ClassificationDarlington, Idaho
MillingGooding, Idaho
DeliveryTo your operation
The stagesMaterial is selected from the deposit and tested for purity before it enters production.
The rock is reduced in stages. Its crystal structure stays intact because nothing is burned and nothing is added.
Screens separate landscape rock, agricultural grit and process fractions, each held to its grade.
6″ × 12″ · 3″ × 5″ · 3″ minus · 1″ × 2.5″ · 1″ minus · ¼″ × 1″
Finer material continues to Gooding, where it is milled into the blend and powder grades.
−10 blend · −200 mesh · −300 mesh
Bulk loading on your schedule. A load ticket and a certificate of analysis travel with every shipment.
One source. Two sites.
Every size.
Everything starts at Darlington. Crushed and screened grades ship from there. The finer fraction continues to Gooding, where it is milled into blend and powder grades.
Darlington, IdahoDeposit · crushing · screening
Ships as
6″ × 12″3″ × 5″3″ minus1″ × 2.5″1″ minus¼″ × 1″
Mechanically processed. No burning. No added chemicals.
- 6″ × 12″
- 3″ × 5″
- 3″ minus
- 1″ × 2.5″
- 1″ minus
- ¼″ × 1″
- −1O blend
- −2OO mesh
- −3OO mesh
Crushed & screened · DarlingtonCaCO₃ · 97–99.9%
The deposit has been tested by independent labs since the early nineties. Every stage is checked, and every load leaves with a certificate of analysis.
- 97–99.9%
- Calcium carbonate, typical analysis
- <O.O1%
- Heavy metals, typical analysis
- 2
- Idaho sites, source to mill
- 199Os
- Independent lab testing since the early
Let’s put itto work.
Share your application, specifications and volume. We’ll help you select a grade, evaluate a sample and plan your supply.














