Technical data sheet
Oolitic Aragonite
Natural calcium carbonate of Bahamian marine origin, mechanically collected, washed, screened and dried.
- 96.17% CaCO3, ASTM C 25
- 38.51% elemental calcium
- 2.93specific gravity
- 20–325U.S. mesh, custom classification
1Product identification
Oolitic aragonite is a naturally precipitated calcium carbonate in the aragonite crystalline form. It occurs as spherical ooids of roughly 50–500 µm, each built from concentric layers of acicular crystals enclosing microscopic voids — a structure that gives the mineral a high surface area and a higher solubility than calcite at the same particle size.
The deposit is Bahamian and marine, sourced through Aragosan Minerals Limited. Sales, quotation and documentation are handled from AragoCor’s Stockton, California office; the shipping origin for an order is confirmed on quotation. Processing is entirely mechanical: collection, drying below 93 °C, screening and classification, with no quarry blasting, no calcination, no chemical treatment and no additives at any stage (PDS-OA-001).
| Item | Detail |
|---|---|
| Chemical name | Calcium carbonate, CaCO3 — natural aragonite polymorph |
| CAS number | 1317-65-3 |
| RTECS number | EV9580000 |
| Molecular weight | 100.09 |
| Appearance and odour | Odourless, white to off-white granular solid or powder |
| Transport classification | Not regulated — no DOT UN number or label |
| Organic status | OMRI Listed, product code avw-23214 — see CERT-OA-001 |
2Mineralogy
| Item | Detail |
|---|---|
| Crystal system | Orthorhombic — aragonite polymorph |
| Crystal habit | Acicular crystals in concentric ooid layers |
| Thermal behaviour | Metastable; converts to calcite then to calcium oxide on heating |
| Comparison with calcite | Denser (2.93 against 2.7), harder (3.5–4 against 3), greater surface area and more soluble at equal particle size |
Solubility products: aragonite 6.0 × 10−9 against calcite 3.36 × 10−9 at 25 °C. Neutralisation testing and the surface-area basis are set out in TB-OA-001.
3Chemical composition
| Component | Value | Unit | Method | Status |
|---|---|---|---|---|
| Calcium carbonate, CaCO3 | 96.17 | % by wt | ASTM C 25 | Representative analysis |
| Calcium, elemental | 38.51 | % by wt | ASTM C 25 | Representative analysis |
| Calcium oxide, CaO | 53.88 | % by wt | ASTM C 25 | Representative analysis |
| Magnesium carbonate, MgCO3 | 0.24 | % by wt | ASTM C 25 | Representative analysis |
| Magnesium oxide, MgO | 0.12 | % by wt | ASTM C 25 | Representative analysis |
| Strontium carbonate, SrCO3 | 1.43 | % by wt | ASTM C 25 | Representative analysis |
| Aluminium oxide, Al2O3 | 0.10 | % by wt | ASTM C 25 | Representative analysis |
| Silica, SiO2 | < 0.01 | % by wt | ASTM C 25 | Representative analysis |
| Iron oxide, Fe2O3 | 0.01 | % by wt | ASTM C 25 | Representative analysis |
| Sodium | 0.21 | % by wt | EPA 6010 | Representative analysis |
| Turbidity | 380 | NTU | API RP 56 | Representative analysis |
| Loss on ignition | 43.50–45.00 | % by wt | — | Published range |
| Sulfur trioxide, SO3 | 0.10–0.20 | % by wt | — | Published range |
| Sodium chloride, NaCl | 0.06–0.25 | % by wt | — | Published range |
| Moisture, as received | 5–10 | % | — | Published range |
Analysis by Bowser-Morner, Inc. (AASHTO/ISO 17025 accredited), report 124914A, sample received 12 January 2026. Sodium by Precision Enviro-Tech (California ELAP #2387). ASTM C 25 assumes elements are present as specific oxides and carbonates, so compound totals need not sum to 100%.
Representative analysis is a measurement from an identified sample and describes material as tested. Published range is a historical deposit range for dried, unwashed material. Neither is a guaranteed minimum or maximum; guaranteed limits are agreed per contract and confirmed per lot by certificate of analysis.
4Physical properties
| Property | Value | Unit | Method | Status |
|---|---|---|---|---|
| Specific gravity | 2.93 | — | — | Representative analysis |
| Mohs hardness | 3.5–4 | Mohs | — | Published range |
| Surface area | > 1.7 | m2/g | Keck Lab | Representative analysis |
| Grain size, ooids | 50–500 | µm | Microscopy | Published range |
| Zeta potential | −6.65 to −33.85 | mV | — | Published range |
| Sphericity, average | 0.82 | — | API RP 56 | Representative analysis |
| Roundness, average | 0.87 | — | API RP 56 | Representative analysis |
| Natural buffering point | 6.8 | pH | Keck Lab | Representative analysis |
| Solubility | Insoluble in water and alcohol; soluble in dilute acids | — | — | Representative analysis |
| Decomposition temperature | approx. 825 | °C | — | Published reference |
| Flammability | Not combustible | — | NFPA | Published reference |
Calcium carbonate decomposes into calcium oxide and carbon dioxide on heating; it does not melt at atmospheric pressure. The decomposition temperature depends on carbon dioxide partial pressure and heating rate, so the figure is approximate and is a published reference for the mineral species, not a test of AragoCor material.
5Particle sizing
Screen size specification — natural commercial grade
| U.S. mesh | Nominal opening | Cumulative % retained | Status |
|---|---|---|---|
| 4 | 4.75 mm | 0–1 | Published range |
| 8 | 2.36 mm | 1–4 | Published range |
| 16 | 1.18 mm | 3–11 | Published range |
| 30 | 600 µm | 10–26 | Published range |
| 50 | 300 µm | 40–67 | Published range |
| 100 | 150 µm | 80–98 | Published range |
| 140 | 106 µm | 93–99 | Published range |
| 200 | 75 µm | 99–100 | Published range |
Figures are cumulative: each is the share of the sample retained on that sieve and every coarser one, so they rise toward the fine end. The share passing a sieve is 100 minus the figure shown. Classified grades are screened from this natural gradation. Nominal openings are standard U.S. sieve equivalents, given for reference.
6Grade selection
| Grade | Sizing | Sizing status | Primary application |
|---|---|---|---|
| AG-CAL | 0.2–0.5 mm | Published range | Agricultural calcium and pH programs; turf top-dressing; feed formulations |
| GL-CAL | < 0.1 mm | Published range | Glass-batch calcium carbonate source |
| WT-CAL | 1–3 mm | Published range | Process-water remineralization, pond preparation, alkalinity management, carbonate aggregate |
| PL-CAL | To specification | Customer specification required | Polymers, coatings and functional fillers |
| Custom | 20–325 mesh range | Customer specification required | Application-specific classification — kiln feed, proppant feed, feed rations, greens plating sand |
20–325 U.S. mesh is the range offered for custom classification to customer specification. It is not the range the published grades span: WT-CAL at 1–3 mm is coarser than a No. 20 sieve.
7Storage and handling
Store dry and covered. Avoid dust generation. The material is non-combustible and stable, and reacts with acids. Calcium carbonate dust is a physical irritant of the eyes, nose, mucous membranes and skin; control exposure below the OSHA PEL of 15 mg/m3 total dust and 5 mg/m3 respirable fraction.
Shelf life is indefinite when stored dry. Occupational safety guidance is set out in SHS-OA-001. Consult the 16-section GHS Safety Data Sheet before handling.
8Packaging options
| Format | Detail |
|---|---|
| Dry bulk | Vessel or bulk trailer |
| Super sack | Up to 3,000 lb |
| Bagged | From 1 lb |
| Sales office | Stockton, California |
Packaging range per PDS-OA-001. Stockton, California is AragoCor’s sales office; the packaging format, shipping origin and freight for an order are confirmed on quotation, and freight is quoted to the named destination.
9Information required for quotation
- Required particle sizing or target specification
- Estimated annual volume
- Delivery destination — city, ZIP or port
- Intended process or application
- Packaging format
- Any standard or specification to be met
10Quality documentation available
| Document | Title | Content |
|---|---|---|
| TDS-OA-002 | Analysis and Gradation | Published composition ranges and screen specification |
| CERT-OA-001 | OMRI Listed® Summary | Organic listing avw-23214, listed 26 Jun 2026, expiring 1 Sep 2027 |
| PDS-OA-001 | Manufacturing Process | Four-step mechanical process; no additives at any stage |
| SHS-OA-001 | Occupational Safety | Exposure limits, hazards, controls and first aid |
| SDS | Safety Data Sheet | 16-section GHS format — hazards, handling, exposure controls and first aid |
| TB-OA-001 | Agricultural Liming Material | Solubility and surface-area basis with laboratory data |
| REF-OA-001 | Published Research | Peer-reviewed literature on aragonite, 2021–2024 |
A certificate of analysis is issued for each dispatched lot. The documents above are available to customers and prospective customers on request.
Send the grade, sizing, annual volume and destination and a sales engineer will respond with pricing and a freight estimate.
Values marked Representative analysis are measurements from an identified sample and describe material as tested. Published range values are historical deposit ranges for dried, unwashed material, and Published reference values are properties of the mineral from a published authority. None constitutes a guaranteed minimum or maximum. A guaranteed specification is agreed in writing per contract and confirmed per lot by certificate of analysis. This information is offered for consideration, investigation and verification. It is not a warranty or representation of suitability for any particular application, nor permission to practise any patented invention.
Revision history
| Rev | Date | Change |
|---|---|---|
| A | Sep 2026 | First issue on approved values. |
| B | 25 Sep 2026 | Section 4: “Melting point” restated as “Decomposition temperature”, value unchanged; removed the unquantified micro-porosity row. Headline sizing relabelled “custom classification”, with a note under section 6 that 20–325 mesh is not the range the grades span. Section 1: “distributed from Stockton” replaced by the sales-office statement, shipping origin confirmed on quotation. Subtitle no longer says “high-purity”. Packaging table: “Distribution” relabelled “Sales office”; packaging format, shipping origin and freight confirmed on quotation. Issued from the website repository; the PDF is printed from this page. |
| C | 12 Oct 2026 | Section 5: the screen table is labelled cumulative percent retained, which is what its figures are — each includes every coarser sieve, so they rise to 99–100% at 200 mesh — and a note states the passing convention. No value changed. |
AragoCor Minerals LLC · 2453 Grand Canal Blvd, Suite 200, Stockton, CA 95207