5 out of 5
Azure Market Diatomaceous Earth, Codex Grade, Price/5 lb
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Product Description
Price is for 5 lb.
Diatomaceous earth packaged under our FOSSIL SHELL FLOUR® label comes from an extremely pure fresh water deposit of the diatom Melosira Preicelanica. Why is this diatom so special? Its shell is made of amorphous silica. Its shape and hardness are important to how it works. Its hardness keeps it from dissolving in liquid. The holes along the diatom's wall allow it to absorb moisture, hence its use as an anti-caking agent. Darker colored diatomaceous earth often contains an excess of a particular mineral such as iron or a high percentage of clay.
Why fresh water vs. salt water DE?
Fresh water deposits like ours have a consistent diatom presence. Their fossilized shells have maintained their tubular shape. This shape and strength of the fossil shell is critical to its effectiveness. Our deposit has 89 - 95 percent amorphous silica content. This deposit is also more consistent in its purity of other elements that have settled in it. A fresh water deposit is confined to the run off water of its surrounding environment. A fresh water deposit in the mountains, such as ours, formed when snow was pure and its run off provided the water source these diatoms lived in. Salt water deposits contain a mix of types of diatoms of different shapes. Their fossilized shells are fragile and break easily. This renders them ineffective for our purposes. The salt water deposits are less predictable in their sediments.
What's the difference between amorphous and crystalline silica?
Amorphous silica is silica in its natural occurring state. It is a trace mineral every mammal on the planet needs to live. It becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing means. The type of diatomaceous earth used in swimming pool, and other, filtration systems is crystalline silica. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable. Perma-Guard diatomaceous earth contains less than one half of 1% of crystalline silica and is considered GRAS (generally regarded as safe).
Bird and animal feed contain substances such as molasses that cause the particles to become "sticky." It forms clumps that not only make the feed hard to pour, but also to become moldy. FOSSIL SHELL FLOUR®, mixed in the feed, coats each particle making it difficult for the particles to stick together. This allows the feed to "flow" better and its absorption ability protects it from mold. No mold means less wasted feed. By separating the particles of feed, the animal's digestive enzymes are able to completely surround each particle. This allows for a more complete digestion. The animal gets more benefit from his feed and the farmer more benefit for his feed dollar.
FOSSIL SHELL FLOUR® anti-caking agent is to be mixed at a rate not to exceed 2% of the dry weight of the rations. This means, when mixing, in every one hundred pounds of feed, 2 pounds of feed is replaced by 2 pounds of FOSSIL SHELL FLOUR® . All regulated products are sold by the information on the label. FOSSIL SHELL FLOUR® is OMRI listed
*The diatomaceous earth carried by Azure Standard is food grade, but we make no representation about its use other than as an anti-caking agent for animal feed as described on our website.
Diatomaceous Earth Codex Grade anti-caking agent is to be mixed at a rate not to exceed 2% of the dry weight of the rations. This means, when mixing, in every one hundred pounds of feed, 2 pounds of feed is replaced by 2 pounds of Diatomaceous Earth.
fossil shell flour®
Why fresh water vs. salt water DE?
Fresh water deposits like ours have a consistent diatom presence. Their fossilized shells have maintained their tubular shape. This shape and strength of the fossil shell is critical to its effectiveness. Our deposit has 89 - 95 percent amorphous silica content. This deposit is also more consistent in its purity of other elements that have settled in it. A fresh water deposit is confined to the run off water of its surrounding environment. A fresh water deposit in the mountains, such as ours, formed when snow was pure and its run off provided the water source these diatoms lived in. Salt water deposits contain a mix of types of diatoms of different shapes. Their fossilized shells are fragile and break easily. This renders them ineffective for our purposes. The salt water deposits are less predictable in their sediments.
What's the difference between amorphous and crystalline silica?
Amorphous silica is silica in its natural occurring state. It is a trace mineral every mammal on the planet needs to live. It becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing means. The type of diatomaceous earth used in swimming pool, and other, filtration systems is crystalline silica. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable. Perma-Guard diatomaceous earth contains less than one half of 1% of crystalline silica and is considered GRAS (generally regarded as safe).
Bird and animal feed contain substances such as molasses that cause the particles to become "sticky." It forms clumps that not only make the feed hard to pour, but also to become moldy. FOSSIL SHELL FLOUR®, mixed in the feed, coats each particle making it difficult for the particles to stick together. This allows the feed to "flow" better and its absorption ability protects it from mold. No mold means less wasted feed. By separating the particles of feed, the animal's digestive enzymes are able to completely surround each particle. This allows for a more complete digestion. The animal gets more benefit from his feed and the farmer more benefit for his feed dollar.
FOSSIL SHELL FLOUR® anti-caking agent is to be mixed at a rate not to exceed 2% of the dry weight of the rations. This means, when mixing, in every one hundred pounds of feed, 2 pounds of feed is replaced by 2 pounds of FOSSIL SHELL FLOUR® . All regulated products are sold by the information on the label. FOSSIL SHELL FLOUR® is OMRI listed
*The diatomaceous earth carried by Azure Standard is food grade, but we make no representation about its use other than as an anti-caking agent for animal feed as described on our website.
Directions
Diatomaceous Earth Codex Grade anti-caking agent is to be mixed at a rate not to exceed 2% of the dry weight of the rations. This means, when mixing, in every one hundred pounds of feed, 2 pounds of feed is replaced by 2 pounds of Diatomaceous Earth.
Ingredients
fossil shell flour®
- Country of origin: United States of America
- Package code: GP009
- Shipping weight: 5.07 lb
- Size: 5 lb
- Storage climate: dry
NOTE: Please read carefully with descripton, ingredients, directions or warning on the actual product before using or consuming the Gourmet Food item.
Perishable items, and chocolates in the summer, have to ship overnight, please Contact Us to confirm actual shipping fee. If you do not want to ship it overnight, NO credits will be written if it arrives melted.
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Return Policy
All AZU- items are non-returnable.
Note
This product is not eligible for coupon code discount, for we've been offering the best price in the market.
Need more information?
Our staff are available to answer any questions you may have about this item
Our staff are available to answer any questions you may have about this item
Customer Reviews
By TRANQUILITY RANCH
Date: November 30, 2025
great product
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Oscar J Baker
Date: November 03, 2025
It was exactly what I have been looking for to use under my bee hives to control small hive beetles and on my lilies to prevent red lily beetles.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Emma Hicks
Date: October 19, 2025
Got this for my fall garden which we will be working on very soon.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Tonya Earles
Date: September 23, 2025
great product and so much cheaper then at the local box store
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By CP
Date: September 07, 2025
For the quality, this is a good deal on DE. I've found it similarly priced at some feed stores or on sale at retailers, but I don't trust the quality as much. So far it seems to be doing what I need it to do around the garden, henhouse, etc.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Laurie Giesler
Date: August 24, 2025
DE in bulk. This works!! I use it for my chickens, my dog, and sometimes myself!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]