--- product_id: 13321249 title: "Optical Calcite (Iceland Spar) Mineral Rock Approx. 5/8-1 Inch - 2 Pieces w Info Card" brand: "squire boone" price: "€ 0.40" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.hr/products/13321249-optical-calcite-iceland-spar-mineral-rock-approx-5-8-1 store_origin: HR region: Croatia --- # North American origin Includes info card Unique optical properties Optical Calcite (Iceland Spar) Mineral Rock Approx. 5/8-1 Inch - 2 Pieces w Info Card **Brand:** squire boone **Price:** € 0.40 **Availability:** ❌ Out of Stock ## Summary > ✨ Elevate Your Space with Nature's Artistry! ## Quick Answers - **What is this?** Optical Calcite (Iceland Spar) Mineral Rock Approx. 5/8-1 Inch - 2 Pieces w Info Card by squire boone - **How much does it cost?** € 0.40 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/13321249-optical-calcite-iceland-spar-mineral-rock-approx-5-8-1) ## Best For - squire boone enthusiasts ## Why This Product - Trusted squire boone brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Great Gift Idea:** Ideal for geology enthusiasts or anyone who appreciates the beauty of nature. - • **Perfect for Display:** Showcase these stunning rocks in your home or office for a touch of natural elegance. - • **Educational & Engaging:** Perfect for ages 8 and up, sparking curiosity and learning. - • **One-of-a-Kind Treasures:** No two pieces are alike, making each set a unique addition to your collection. - • **Discover Nature's Wonders:** Unleash the beauty of unique optical calcite rocks that captivate the eye. ## Overview This pack includes two unique Optical Calcite (Iceland Spar) mineral rocks, each measuring approximately 5/8-1 inch, accompanied by an informative card. Originating from North America, these rocks are perfect for educational purposes and display, appealing to both young learners and seasoned collectors. ## Description Also known as Iceland Spar, Calcite (CaCo3) is a very common mineral, composed mainly of calcium carbonate. It is used in making optical instruments, particularly polarizing microscopes. Optical calcite has a rhombohedral crystal structure and is colorless and transparent. Optical calcite possesses the unique ability to split one ray of light into two rays of light, otherwise known as double refraction. An object viewed through this crystal will be seen doubled. If the clear calcite crystal is rotated, one image remains stationary while the other image revolves. The stationary image is the ordinary ray, the rotating image is the extraordinary ray, which is polarized at 90 degrees to the ordinary ray. Picture is representative of the specimen you will receive. Each rock is unique and will vary in shape, size, thickness and appearance. No two rocks are exactly alike. Ages 8 and up. ## Features - Pack of 2 Optical Calcite Rocks - Includes 1 information card - Ages 8 and up - Origin: North America - No two rocks will be exactly alike ## Images ![Optical Calcite (Iceland Spar) Mineral Rock Approx. 5/8-1 Inch - 2 Pieces w Info Card - Image 1](https://m.media-amazon.com/images/I/31b9Z04WRdL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Viking stone *by A***R on Reviewed in the United States on May 29, 2013* I purchased this item to help teach my grandson about the Vikings and how they were able to navigate across the ocean. He as very interested and set of on his own research and now we better communication and shared learning experiences. ### ⭐⭐ 2.0 out of 5 stars Need a better piece *by T***N on Reviewed in the United States on June 24, 2014* Too cloudy to use for teaching. It's a piece of calcite, for Pete's sake, for the price, it should have been better quality. ### ⭐⭐⭐ 3.0 out of 5 stars not as good as I hoped *by A***R on Reviewed in the United States on April 30, 2018* not as good as I hoped, but then again, this was a cheap price, came with a larger (3/4" x 3/4''x 1") and a thinner one (approx 3/16" thick), but the larger one somewhat demonstrates the effect. Not as a 'viking sunstone' as I'd hoped. Fast delivery . Can't really complain, as the clear ones are $20+. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/13321249-optical-calcite-iceland-spar-mineral-rock-approx-5-8-1](https://www.desertcart.hr/products/13321249-optical-calcite-iceland-spar-mineral-rock-approx-5-8-1) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-05*