Amazon.com.au:Customer reviews: NATIONAL GEOGRAPHIC Break Open 10 Premium Geodes – Includes Goggles, Detailed Learning Guide and 2 Display Stands - Great STEM Science gift for Mineralogy and Geology enthusiasts of any age
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Customer reviews

4.5 out of 5 stars
4.5 out of 5
23,798 global ratings
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4 star
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3 star
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2 star
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NATIONAL GEOGRAPHIC Break Open 10 Premium Geodes – Includes Goggles, Detailed Learning Guide and 2 Display Stands - Great STEM Science gift for Mineralogy and Geology enthusiasts of any age

NATIONAL GEOGRAPHIC Break Open 10 Premium Geodes – Includes Goggles, Detailed Learning Guide and 2 Display Stands - Great STEM Science gift for Mineralogy and Geology enthusiasts of any age

byNational Geographic
Style Name: 10 Geodes KitChange
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Top positive review

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Rowann Lambert
5.0 out of 5 starsExcellent well worth it!
Reviewed in Australia on 19 April 2021
Great fun! We got some really nice ones and a couple of rocks with only a small amount of crystal or non at all (not pictured). We got a giant one which I though would be a dud but it's one of the best! All only white crystals but when you read the info book that comes with it that is to be expected.I bought this as a school holiday activity as we had been looking at geodes and made some at home using egg shells Alum and laster and wanted to show what the real thing was like. Follow the instructions to make sure you get a nice cross section and not a just a bunch of pieces. Happy with my purchase and with how quickly it arrived.
Note the cardboard box is not the actual product , I've seen reviews which complained about the plain cardboard packaging, open the plain cardboard and the product is in a box as displayed.
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Top critical review

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Rebecca
1.0 out of 5 starsSo disappointing!
Reviewed in Australia on 30 August 2020
Does not look anything like packaging! Extremely difficult to open, both adults tried and it took so many blows, sometimes they never opened because there was no opening on the inside just a ball of concrete and there is no way a kid could do it. Colours are crap, one purple one in the whole batch, the rest are white.
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4 people found this helpful

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From Australia

Rebecca
1.0 out of 5 stars So disappointing!
Reviewed in Australia on 30 August 2020
Style Name: 10 Geodes KitVerified Purchase
Does not look anything like packaging! Extremely difficult to open, both adults tried and it took so many blows, sometimes they never opened because there was no opening on the inside just a ball of concrete and there is no way a kid could do it. Colours are crap, one purple one in the whole batch, the rest are white.
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Rebecca
1.0 out of 5 stars So disappointing!
Reviewed in Australia on 30 August 2020
Does not look anything like packaging! Extremely difficult to open, both adults tried and it took so many blows, sometimes they never opened because there was no opening on the inside just a ball of concrete and there is no way a kid could do it. Colours are crap, one purple one in the whole batch, the rest are white.
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From other countries

Bex
5.0 out of 5 stars Would definitely recommend if your little person has a fascination with rocks and crystals!!
Reviewed in the United Kingdom on 10 April 2017
Style Name: 10 Geodes KitVerified Purchase
My 8 year old newphew loves these geodes. I think he was a little bemused at Christmas and wasn't sure what to expect but once his Dad got the hammer out and they started to have a go at cracking them open he really loved it. There is much excitement waiting to see which of the perfectly adjusted hammer hits would crack it open to reveal the treasure. So far they have opened 5 and they've all be quartz (is that right? the clear crystals) and the rest are proving to be a bit more difficult to get into. This however is not a bad thing, it adds to the excitement.
There is a level of skill needed to ensure you use the right strength to get them open but with adult supervision it's great. The goggles were strong and protective. Would definitely recommend if your little person has a fascination with rocks and crystals!!
11 people found this helpful
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ExpatFamily06
4.0 out of 5 stars Fun Christmas gift
Reviewed in the United Kingdom on 4 October 2020
Style Name: 10 Geodes KitVerified Purchase
I bought this for my 8 year old son for Christmas and he loved opening them. A few were extremely hard to open, but we got there in the end! These definitely need an adults help to score them and crack open. So, in that sense, it was a bit of a bummer for my son since he couldn't break them open on his own. I think we ended up with one solid rock, but the rest opened. My son was really hoping for a purple rock, but he only ended up with white. Overall, for being rocks, they're pricey, but I did find Amazon to be the cheapest.
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Pfd
5.0 out of 5 stars Geodes rock 🤘
Reviewed in the United Kingdom on 22 February 2019
Style Name: 10 Geodes KitVerified Purchase
The Geodes arrived on time and were amazing..... I got 2 quite large Geodes and the rest were smaller but everyone was hollow, as in some cases when u smash one open they can often be solid, which is nice but not as cool as a hole Geode. Very good but for the price and I would buy again.
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David
1.0 out of 5 stars Don't bother
Reviewed in the United Kingdom on 28 February 2021
Style Name: 10 Geodes KitVerified Purchase
Only 2 out of the 10 geodes could be broken open, the rest were useless
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CovaraC
3.0 out of 5 stars 30% white geodes , the rest are rocks
Reviewed in Canada on 12 July 2021
Style Name: 10 Geodes KitVerified Purchase
I got 2 package of 10 Geodes, From total 20, only 7 were geodes and 13 of them rough rocks. From those 7, only 2 were geodes that we can call them ""Premium"" ,the rest were only white below grade geodes.
None of them even close to the pictures on the box or in the booklet provided.
I would say this is China National Geographic Grade 0 not US.
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summer
5.0 out of 5 stars Had fun hammering.
Reviewed in Canada on 3 July 2020
Style Name: 10 Geodes KitVerified Purchase
Got my package today, opened it immediately.

From the weight, 4 of them are hollow inside (#1-4 in picture), the rest probably either solid or small hollow space. Another picture shows the one (#1) was being hammered open, sadly to few pieces. We didn't open them all, try to find a better way to open the hollow ones than just hammer them.

I strongly feel this geode set is probably better for 10 year old and above, my 15 year old had hard time to crack open a small solid one.

Over all, we felt we just had a little adventure exploring rocks, it's worth.
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summer
5.0 out of 5 stars Had fun hammering.
Reviewed in Canada on 3 July 2020
Got my package today, opened it immediately.

From the weight, 4 of them are hollow inside (#1-4 in picture), the rest probably either solid or small hollow space. Another picture shows the one (#1) was being hammered open, sadly to few pieces. We didn't open them all, try to find a better way to open the hollow ones than just hammer them.

I strongly feel this geode set is probably better for 10 year old and above, my 15 year old had hard time to crack open a small solid one.

Over all, we felt we just had a little adventure exploring rocks, it's worth.
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GinaMTL
4.0 out of 5 stars Recommended
Reviewed in Canada on 26 August 2018
Style Name: 10 Geodes KitVerified Purchase
Received two large rocks and the rest were about the size of a nectarine. My son had a blast smashing these rocks! After smashing: Mostly received white, 1 agate type, 1 decomposed stone, 1 light blue, and 1 that will not crack no matter how hard we try .
2 people found this helpful
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Rubymc70
2.0 out of 5 stars 20% rock
Reviewed in Canada on 11 December 2018
Style Name: 10 Geodes KitVerified Purchase
Two of the ten were rocks. The rest were white. My daughter liked them. So I guess it was a good. I was sad 20% were no good.
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Rubymc70
2.0 out of 5 stars 20% rock
Reviewed in Canada on 11 December 2018
Two of the ten were rocks. The rest were white. My daughter liked them. So I guess it was a good. I was sad 20% were no good.
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4 people found this helpful
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Clairdelune
3.0 out of 5 stars Une des géodes n'avait pas de cristaux
Reviewed in France on 2 October 2020
Style Name: 4 Geodes KitVerified Purchase
Un peu déçu car sur les 4 géodes, l'une d'elles était "pleine" et n'avait pas de cristaux à l'intérieur (ou pas très visibles dans tous les cas). Du coup, je n'ai pas fait exprès de commencé par celle-ci mais elle était très difficile à casser puisqu'elle n'était pas creuse (tout ça pour ça...). Pour les autres, ça reste difficile aussi, ma fille n'y arrivait pas et pour ma part je n'ai pas réussi à les couper proprement en 2 (beaucoup de petits morceaux).
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Clairdelune
3.0 out of 5 stars Une des géodes n'avait pas de cristaux
Reviewed in France on 2 October 2020
Un peu déçu car sur les 4 géodes, l'une d'elles était "pleine" et n'avait pas de cristaux à l'intérieur (ou pas très visibles dans tous les cas). Du coup, je n'ai pas fait exprès de commencé par celle-ci mais elle était très difficile à casser puisqu'elle n'était pas creuse (tout ça pour ça...). Pour les autres, ça reste difficile aussi, ma fille n'y arrivait pas et pour ma part je n'ai pas réussi à les couper proprement en 2 (beaucoup de petits morceaux).
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