---
product_id: 208724700
title: "EISCO 12PK Raw Gray Limestone, Sedimentary Rock Specimens - Approx. 1\" - Geologist Selected & Hand Processed - Great for Science Classrooms - Class Pack"
price: "$1167"
currency: MXN
in_stock: true
reviews_count: 7
url: https://www.desertcart.mx/products/208724700-eisco-12pk-raw-gray-limestone-sedimentary-rock-specimens-approx-1
store_origin: MX
region: Mexico
---

# Approx. 1-inch uniform size Calcium carbonate reactive in acid 12 handpicked limestone specimens EISCO 12PK Raw Gray Limestone, Sedimentary Rock Specimens - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Class Pack

**Price:** $1167
**Availability:** ✅ In Stock

## Summary

> 🧑‍🔬 Elevate your science class with rocks that rock the curriculum!

## Quick Answers

- **What is this?** EISCO 12PK Raw Gray Limestone, Sedimentary Rock Specimens - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Class Pack
- **How much does it cost?** $1167 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/208724700-eisco-12pk-raw-gray-limestone-sedimentary-rock-specimens-approx-1)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Uniform Size for Group Study:** Consistent ~1-inch samples make comparison and classification exercises seamless and effective.
- • **Geologist-Selected Authenticity:** Each specimen is handpicked and processed by a professional geologist, ensuring genuine and educationally valuable samples.
- • **Individually Packaged & Labeled:** Each rock comes barcoded and bagged for easy identification, storage, and classroom organization.
- • **Perfect Classroom Chemistry Demo:** Watch calcium carbonate effervesce in acid—ideal for hands-on learning and engaging science experiments.
- • **Locally Processed with Global Sourcing:** Sourced worldwide and carefully processed in Victor, NY, supporting quality and traceability.

## Overview

This set of 12 raw gray limestone specimens, each about 1 inch in size, is hand-selected by geologists to showcase authentic sedimentary rock features. Perfect for classroom use, these calcium carbonate-rich samples demonstrate acid reactivity and support identification exercises. Individually packaged and labeled for easy handling, they bring a professional touch to geology education.

## Description

Raw Gray Limestone SpecimenSet of 12 Samples, 1"The massive, gray variety of limestone is often found deposited in marine environments. It is made up of organic material, primarily calcium carbonate. Excellent for demonstrating the tendency of calcium carbonate to effervesce in acid, and is perfect for identification and classification exercises.While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage.Selected & Processed by a Geologist.Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY.Technical SupportAlways feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.

Review: Not what I expected - Rather costly for such simple small raw rock
Review: Technically 'gray' but actually black - For use in the classroom my students struggled to compare basalt and this limestone because it was so dark. It was only density that helped them distinguish between the two. Pieces are about 1" each.

## Features

- GRAY LIMESTONE | The massive, gray variety of limestone is often found deposited in marine environments. It is made up of organic material, primarily calcium carbonate
- GREAT FOR GEOLOGY CLASSROOMS | Excellent for demonstrating the tendency of calcium carbonate to effervesce in acid, and is perfect for identification and classification exercises. This set of six samples is excellent for group study and examination
- GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features
- LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY
- INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 3.7 out of 5 stars 73 Reviews |

## Images

![EISCO 12PK Raw Gray Limestone, Sedimentary Rock Specimens - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Class Pack - Image 1](https://m.media-amazon.com/images/I/81BR3CXsetL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: Will this help raise the pH in my fish tank?**
A: This product is meant for a classroom/laboratory setting, we do not have information on this product in relation to the pH of a fish tank.

## Customer Reviews

### ⭐⭐⭐ Not what I expected
*by M***Z on February 8, 2025*

Rather costly for such simple small raw rock

### ⭐⭐⭐ Technically 'gray' but actually black
*by N***S on December 18, 2022*

For use in the classroom my students struggled to compare basalt and this limestone because it was so dark. It was only density that helped them distinguish between the two. Pieces are about 1" each.

### ⭐ Look at measurements before buying
*by J***R on January 8, 2025*

Wish I had paid attention to size….this was basically a pebble

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**Shop now:** [https://www.desertcart.mx/products/208724700-eisco-12pk-raw-gray-limestone-sedimentary-rock-specimens-approx-1](https://www.desertcart.mx/products/208724700-eisco-12pk-raw-gray-limestone-sedimentary-rock-specimens-approx-1)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-22*