High Whiteness Decorative Gravel Calcium Pebbles for Pathway and Courtyard Design

• Overview
• Specification
• Company Profile
• Certifications
• FAQ

Overview

Basic Info.

Surface Finishing	Polished
Color	White
Usage	Paving, Decoration, Landscape
Type	Sand
Stone Form	Cut-To-Size
Sandstone Type	Litharenite
Sand Particle Size	Customer Specified
Application	Landscaping, Decorative Paving, Aquarium Filter, C
Process	Crushed Sieved Washed Dried Packed
Shape	Rounded / Crushed
Transport Package	Bag/Ton

Product Description

High Calcium Limestone Pebbles | White Decorative Gravel | Calcium Stone for Landscaping & ConstructionOur Calcium Sand / Limestone Granules are made from high-purity natural limestone (CaCO3≥ 98%).
The product features uniform particle size, high whiteness, and excellent chemical stability.
It serves multiple purposes — from landscaping decoration to soil improvement and animal feed calcium supplement.Key Features
Landscaping / Garden paths / Flower-bed edging
Architectural decoration / Dry rock gardens / Fountains
Aquarium / Pond filter media / Water-feature bases
Decorative paving for plazas, hotel courtyards, and public gardens

Specification

calcium pebbles, limestone gravel, decorative white stones, landscaping rock, aquarium filter media, garden paving stoneHigh Purity, Natural and Eco-FriendlyDurable, Uniform, and Visually AppealingVersatile Application and Reliable SupplyThey feature bright whiteness and a clean appearance while remaining completely natural and chemical-free.Safe for use in gardens, ponds, aquariums, and architectural spaces, the stones do not release harmful substances or affect soil or water pHEach pebble is carefully crushed, screened, and washed to ensure uniform size, smooth surface, and bright color.
With a Mohs hardness of about 3.0, the material is highly resistant to crushing, fading, and weathering, maintaining its decorative look for years in outdoor environments such as pathways, fountains, and plazas.Calcium pebbles can be used in landscaping, architectural decoration, water filtration, and construction projects.
Available in multiple sizes (3–6 mm, 6–12 mm, 12–20 mm or customized), they are packed in 25 kg PE-lined bags or 1.25-ton jumbo bags.
Supported by Hongyu's 40-year manufacturing experience, dual production bases, and strict quality control, we guarantee consistent purity, stable supply, and dependable export service.

Moisture	≤ 0.3 %	<0.2
Particle Size	3–6 mm / 6–12 mm / 12–20 mm (customizable)	customizable
Weight	50kg/1ton
Density	2.7 g/cm³
Mohs Hardness	3

Company Profile

Changshu Hongyu Calcium Industry Co., Ltd.Changshu Hongyu Calcium Industry Co., Ltd.Changshu Hongyu Calcium Industry Co., Ltd., founded in 1984, is a professional manufacturer specializing in lime and calcium-based materials with more than 40 years of experience in the industry.The company is headquartered in Changshu, Jiangsu Province, with a second production base in Hubei Province, and owns a high-purity limestone mine that ensures a stable and reliable source of raw materials.
This vertical integration — from mining to finished products — allows Hongyu to maintain full control over quality and consistency.Our main product lines include:Calcium Oxide (CaO) — high-reactivity quicklime in lump, granular, and powder forms.
Calcium Hydroxide (Ca(OH)2) — produced by advanced wet-process technology, featuring high purity and excellent whiteness.
Calcium Carbonate (CaCO3) — including ground, coated, and nano calcium carbonate, as well as calcium sand and calcium pebbles for landscaping and architectural use.
With a daily production capacity of around 500 tons, Hongyu Calcium has established a complete industrial chain integrating mining, calcination, hydration, grinding, packaging, and testing.
All products are strictly inspected in-house and comply with SGS and ISO international quality standards.Our modern laboratory is equipped with whiteness testers, laser particle-size analyzers, BET surface area instruments, and high-temperature furnaces, ensuring accurate testing of each production batch.
Thanks to this commitment to quality, Hongyu products are exported to more than 20 countries and regions, covering Southeast Asia, the Middle East, Europe, and Africa.At Hongyu Calcium, we uphold the principles of "Quality First, Integrity Always" and are dedicated to offering our global partners not only reliable products but also tailored technical support and stable long-term supply solutions.

Global ShowroomsFactory CapabilitiesChangshu Hongyu Calcium Industry Co., Ltd. was established in 1984 and has more than 40 years of experience in natural limestone mining and processing.
We own our exclusive limestone mine and two production bases located in Changshu (Jiangsu) and Hubei Province, ensuring stable quality, rich reserves, and long-term supply.Factory-direct supply from our own quarry and plant
Customized sizes and packaging (bulk, ton bag, or small bags)
Export experience in Asia, Europe, and the Middle East
Over 40 years of craftsmanship and reputation

Packing & LogisticsExtended Product RangeStandard export packing, available in:
- 25 kg woven bags with inner PE liner
- 1 ton jumbo bags (FIBC) with forklift loops
- Bulk loading for large landscaping projectsPalletized and shrink-wrapped for safety during transportCustom labeling, logo printing, and color-coded bags available upon request
Delivery options include:
- 20' GP container (approx. 25–26 MT)
- 40' HC container (approx. 26–28 MT)
- Bulk vessel shipment for orders above 3,000 MTLoading directly from our factory near port areas (e.g. Shanghai / Zhangjiagang) ensures fast dispatchExport experience covering Asia, Middle East, Europe, and Africa, with full shipping documents (COA, PL, CI, BL)Certifications

2015 Certified ProductionSGS TESTSafety Standard (No loose trim)FAQ1. Are your calcium pebbles natural? Any chemical additives?
Our pebbles are made from natural high-calcium limestone with no chemical additives. They are 100% safe, non-toxic, and environmentally friendly.
2. What sizes do you offer? Is customization available?
Standard sizes include 3–6 mm, 6–12 mm, and 12–20 mm.
Custom sizes are available upon request depending on your project needs.
3. What are the main applications?
Landscaping and garden decoration
Pathway and ground paving
Aquarium and pond filtration
Architectural and public landscape projects
Glass manufacturing and industrial flux

4. What is the chemical composition?
Our material is high-calcium limestone5. What packaging options are available?
We offer:25 kg PE-lined woven bags
1.25 ton jumbo bags with moisture-proof inner liner
Both options are export-ready and suitable for container loading.

6. Can you provide samples?
Yes, we can provide 1–2 kg samples for testing. Samples are free, but freight costs should be covered by the buyer.
7. How many tons can be loaded in a container?
20GP: approx. 25 metric tons
40HC: approx. 27 metric tons

8. What is your delivery time?
Regular orders can be shipped within 7–10 days.
Bulk orders usually take 10–15 days, depending on the production schedule.
9. Will the stones fade or dissolve in water?
No. The stones are color-stable and non-soluble, suitable for long-term outdoor use and water filtration systems.
10. How do you ensure consistent quality?
We own our limestone quarry and two production plants.
Each batch is tested for particle size, whiteness, and CaCO content.
COA and test reports are provided for every shipment.