Tag: agate

Yellow Fortification Agate Geode Cabochon

Yellow Fortification Agate Geode Cabochon

Rock #4876Click to enlarge This is a beautiful cab cut from a cross cut slab from a Carver geode. The crystal-lined geode center sparkles in the center of the yellow fortification agate. The sagenitic material (green and brown stuff) along the top edge of the stone indicates that this was the bottom of the geode when formed in a lava gas pocket. The sagenitic material likely fell off the inside top of the gas bubble pocket to the bottom of the gas bubble pocket where it was encapsulated by bluish agate (silica) as it filled the gas bubble pocket. See photo 4877 below which is the same stone photographed with the sagenitic material on the bottom of the stone as it would have been formed. Rock #4877Click to enlarge

Lava Breccia in Agate Matrix

Lava Breccia in Agate Matrix

What a unique and interesting cab! Close-up shows lava shard at top centerClick on the image to view an enlarged version Another cab from the same stoneNote the same lava shard (top center) These two cabochons were cut from a single stone. The lava shard (top center in both stones) shows their common origin. Above is another agate breccia with banded agate (top and lower right shards) with a lava shard in the lower center of the stone. Note the eye agate on the left center edge of the cut stone. While this stone is not pretty, it sure is interesting—at least to an old rocker like me.

Why did I cut that stone that way?

Why did I cut that stone that way?

Cutting and polishing a stone is often a matter of the stone’s pattern and coloration. The larger the pattern of the stone to be cut, the larger the finished stone will need to be. A very petite pattern will physically fit into a small cut stone, but will be so small in a piece of jewelry when set that you can’t see the pattern from the distance it is viewed. So, the pattern of the feature you want to highlight must be large enough to be seen by someone standing next to you. The shape of the cab being cut, e.g., oval, round, triangle, rectangle, square, or free form, will limit what part of the pattern can be captured in the finished cut stone. Accordingly, I do many designer free form shapes and sizes and I also cut a great many large cabs in order to capture the maximum part […]

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Two Completely Different Triangular Free-form Cabs from The Carver

Two Completely Different Triangular Free-form Cabs from The Carver

These stones are all Carver agates, but completely dissimilar in their appearance. The First Stone The first stone looks like a deep blue underwater scene with multicolored sagenitic (cool stuff!) that look like underwater plants in an undersea cavern. Put your imagination to work and, if you are old like me, think of Lloyd Bridges and Sea Hunt! Rock # 4727 Click to enlarge Rock # 4727 detail Click to enlarge More Stones The next two stones are blue and white banded agate, one of which is a pyramidal free-form. While I have recently cut several other stones, I like these best. Rock #4711 Click to enlarge Rock #4711 Click to enlarge Rock #4713 Click to enlarge

New Free-form Cabs from The Carver

New Free-form Cabs from The Carver

The pictures tell the story of the fascinatingly unique and diverse agates I continue to find and cut. It is important to remember that all of these stones came out of the same geologic formation, yet they all look very different. Fun for me and, I hope, interesting for you. Rock #4705: Angular free-form agate Rock #4708 Rock #4709

Sagenitic Agate

Sagenitic Agate

This cab, which is very large, approximately 1 1/4 x 2 1/2 inches, was not cut (as I usually do) from a large geode or nodule. Rather, the stone, when originally collected by me from The Carver Agate Field, was essentially the same shape and size as pictured. Rock # 4694 It had the classical amygdaloidal (almond) shape with a flat bottom and rounded top. I hand ground, smoothed and polished the outside of this specimen. While grinding away a small amount of the stone to reveal the underlying sagenitic agate, the crystal filled geode center appeared. When I began grinding, I had no idea that I would grind through the thin surface into an underlying crystal filled center. The end of the stone with the yellow dot which looks like it has ice around it (looks a lot like Antarctica, doesn’t it?) is what I have previously seen and […]

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Odd Fellows “All Seeing Eye” Agate

Odd Fellows “All Seeing Eye” Agate

Folks looking at my polished stones often comment on seeing an image in the stone. Usually, I see the image they point out, but I did not see it until it was brought to my attention. It is much like seeing faces or images in the clouds. Well, this week after I cut and polished a cabochon, I saw the Odd Fellows ‘All Seeing Eye’. A bit of history and personal history is in order. Rock #4698 The “Eye” The Odd Fellows were a very popular fraternal organization with over 1,000,000 US members ‘back in the day’. They were social, secretive and ritualistic, much like the Masonic order. They were also charitable and had one basic requirement in order to belong: the belief in a supreme being (God). Their primary and most famous symbol was the ‘All Seeing Eye’ which was also a Masonic symbol. In fact, our founding fathers, […]

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Spectacularly Interesting Carver Vein Agate!

Spectacularly Interesting Carver Vein Agate!

The jagged rind of this agate is the rough lava or crack in which the agate formed. While the crack was filling with dissolved silica, forming the fortification agate on the upper right, some fractured yellow jasper shards or chips fell into the vein or crack and was surrounded by the silica which agatized! Photo 4690 shows the jasper shard, which was cut by the diamond saw: Photo #4690 Photo 4689 is the same shard of jasper on the other side of the saw blade that cut this second slab: Photo 4689 Photo 4689 enlarged is ‘filled’ with sagenitic inclusions that formed as silica was filling the crack or vein in the lava: Photo 4689 This sagenite indicates the bottom of the rock as formed. Note there is no such sagenite on the top side of the stone as seen in photo 4688: Photo 4688 Gravity explains why the sagenitic […]

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Five Random Carver Agates

Five Random Carver Agates

Here are five random Carver agates I cut this week! One is the first one I’ve seen! These are five of the six agates I cut this week. The sixth stone will be the subject of my next blog. It is so cool and unusual. Detail of Rock #4681 – Click to enlarge Rock #4679 – Click to enlarge Rock #4685 – Click to enlarge Rock #4683 – Click to enlarge Rock #4687 – Click to enlarge Being lucky enough to cut five totally different agate types in a single week is a ‘rock hound’ fantasy! And why I never get bored as I continue to explore the amazing diversity of the Carver Agate Field agates. The highly variable colors, patterns, banding, and sagenitic inclusions make these just pure fun. Rock #4685 is another ‘first’ for me: white matrix with multiple colored sagenitic inclusions. I wish I had 50 pounds […]

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My Birthday Agates!

My Birthday Agates!

These stones are maybe the prettiest agates I have cut. Or, they just seem like the prettiest because I just cut them! Both show clear evidence of red and yellow jasper that was fractured into shards and then cemented back together by silica which entered into the cracks. When the silica enters the cracks, it creates tiny fortification agates and other banded agates, e.g., a jasp-agate. I think the patterns created are simply beautiful. The free form shapes of these stones are the result of trying to capture all of the detail and coloration that is present. If I had cut the stones in the more conventional round or oval cabochon shape, much of the stones’ patterns and coloration would have been lost. Rock #4643 Rock #4645