Making a Geode Soap

Several years ago when I visited the Natural Science museum, they were selling unopened geodes outside the main exhibits. It was a round rock that would fit in your hand; and after you bought one, you could have it cracked by a machine or tools they had, and see if you got any crystals inside. I was intrigued enough to look around, but too cheap to buy one, as it was not a guaranteed you would get crystals inside, and I like crystals!

Making crystal soaps has been one of my favorite things to do too. However, I have never attempted to make a full size soap geode. The closest thing I made was the agate soap embeds (agates being slices of geodes pretty much). So when I saw that the January challenge of the Soap Challenge Club would be making geode soaps, I was curious and decided to participate.

Here is the video of the making, and below are more pictures and supply list, recipe, etc, etc.etc!

Link to recipe from lye calculator

Recipe Totals

Note: I am using a lye blend that includes Koh (Potassium hydroxide), mainly because I bought some for a project, did the project, now I have a lot leftover and want to use it up. Also because I have read that it helps increase bubbles, and my husband loves a bubbly soap. You can run use the link above to copy and modify the recipe, and get the amounts for just Naoh.

Liquid Required	6.19 oz	175.43 g
NaOH Weight	2.95 oz	83.52 g
KOH Weight	0.24 oz	6.85 g at 90% Purity
Lye Weight	3.19 oz	90.37 g
Oil Weight	22 oz	623.69 g
Fragrance Oil Weight	1.38 oz	38.98 g
Superfat		5%
Total Batch Weight	33.09 oz	938.07 g
Lye Concentration		34%
NaOH / KOH Ratio		95% / 5%
Liquid : Lye Ratio		1.94 :1
Saturated : Unsaturated		45:55

Recipe Oils, Fats and Waxes

Oil	%	Ounces	Grams
Olive Oil	30	6.6	187.11
Tallow Beef	30	6.6	187.11
Coconut Oil, 76 deg	25	5.5	155.92
Castor Oil	8	1.76	49.9
Shea Butter	7	1.54	43.66
Total	100	22	623.69

Custom Additives

Add with the Fats
Rosemary oleoresin	0.01 ounce (you need a jeweler’s scale for this)
Add at trace
Tetrasodium EDTA	0.33 ounce

For more information on these additives you can click in the links below, please note above links are affiliate ones.

Rosemary oleresin

Tetrasodium EDTA

Fragrances

1.3 oz of Cucumber Melon

Nurture Soap

Embeds

• I made the crystals with Crystal Clear MP and an eXacto knife
• Salt from a Salt Mill Refill

Equipment

• List of regular equipment

Molds

• 4″ Silicone mold
• Oval cavity Molds from Nurture Soap

Colorants

• 1/2 tsp of Shimmering White Mica and 1/4 tsp of Snowflake Sparkle mica (for 6 oz of soap)
• Super Sparkles Enviroglitter (to sprinkle on top)
• 1/4 tsp Azure Blue Mica (for 4 oz of soap batter)
• 1/4 tsp Synergy Mica
• 1/4 tsp Turquoise Teal from WSP
• 1/4 tsp Sea Green Mica
• 1/4 tsp Ocean Blue enviroglitter (discontinued)
• 3/4 tsp of Starry Night enviroglitter for 6 oz of soap batter
• Gold Dust Enviroglitter (for mica swirl)

Several of the links above are affiliate links, if you use them, I will get a small percentage back that will help keep this blog running.