Free 2.5 kg sample with its certificate of analysis Ships from Mundra PortCFR / CIFMOQ one 20ft container
Quality

Tested independently, every shipment

We are a young exporter and you have no history with us. So we do not ask you to trust our own laboratory. Every shipment is tested by an independent NABL-accredited laboratory and ships with a certificate of analysis.

How testing works

From the bagging line to your inbox

01Lot is madeOne grade, one recipe, about one container
02Sample drawnTaken from the lot at bagging
03Independent labNABL-accredited, tested to the grade’s standard
04Certificate issuedAgainst the lot number
05Ships with the documentsCOA sent before the vessel sails
ProductTested to
Drilling gradeAPI 13A, by API 13B-1 methods
Civil / piling gradeSlurry properties against EN 1538 limits
Foundry gradeAFS methods, buyer specification
Pelletising gradeSwell, Enslin, methylene blue, fineness
Cat litter gradeBuyer specification
Plastic white clayCeramic raw-material evaluation

XRD mineralogy report, on request

X-ray diffraction shows what minerals the clay is made of: montmorillonite, the swelling mineral that does the work, and quartz and other impurities. We use it to characterise each grade and each new mining face, at an outside laboratory, and send the report to buyers who ask. It also gives the crystalline silica figure that goes on the safety data sheet.

Laboratory bench with a viscometer and filter press
Every lot is tested before it ships
Certificate of analysis

What arrives with every shipment

A sample certificate for an OCMA-grade lot. The real one carries the container number, the test date and the laboratory’s report number.

Skystone MineralsJannat Park, Sural Bhit Road, Bhuj, Kutch, Gujarat 370001, India
Certificate of Analysis
Product
OCMA-grade bentonite
Specification
API Spec 13A, OCMA-grade
Lot number
OCM-2610-03
Quantity
26.0 MT, 1,040 × 25 kg
Container
XXXU 000000-0
Date of test
DD Month YYYY
PropertyMethodLimitResultStatus
Viscometer dial reading at 600 r/minAPI 13B-1min 3033Pass
Yield point / plastic viscosity ratioAPI 13B-1max 64.1Pass
Filtrate volume, 30 min (cm³)API 13B-1max 16.014.6Pass
Residue greater than 75 µm (%)Wet sievemax 2.51.9Pass
Moisture as shipped (%)Oven dry, 105 °Creport10.5Pass
Swell index (mL/2 g)ASTM D5890report22Pass
Tested byIndependent NABL-accredited laboratoryULR No. TC0000000000000000F
ConclusionConforms to API Spec 13A, OCMA-grade
Authorised signatory
Traceability

What the lot number means

OCM - 2610 - 03
 |      |      |
 |      |      +-- third lot of that grade that month
 |      +--------- year 26, month 10
 +---------------- grade code

Grade codes: OCM OCMA drilling · DRL API 13A Section 9 · CIV civil / piling · FDY foundry · PEL pelletising · CAT cat litter · WPC plastic white clay.

One lot is one grade from one recipe, about 26 tonnes, the size of one 20ft container. The lot number is on the certificate of analysis, and printed on the bags when a buyer asks.

What travels with every shipment

Certificate of analysis against the lot number · commercial invoice · packing list · bill of lading · certificate of origin, preferential under the India–UAE CEPA for UAE shipments · insurance certificate on CIF terms.

Technical data sheets and safety data sheets on request.

Want to witness it? Pre-shipment inspection by SGS, Bureau Veritas or Intertek can be arranged at the bagging plant before the container is sealed.
Compliance

What we hold, and what we don’t

Mining leases

Held

Granted by the Government of Gujarat, Kutch district

GPCB consent

Held

Gujarat Pollution Control Board

Importer-Exporter Code

Registered

Directorate General of Foreign Trade

Independent testing

Every shipment

NABL-accredited laboratory

We do not hold ISO 9001 or the API Monogram, and we do not claim them. Registration numbers are shared with buyers on request.

Test it against what you buy today.

A 2.5 kg sample with its certificate of analysis, sent by DHL or FedEx. Tell us your current supplier's figures and we will tell you honestly how ours compare.

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