July birthstone

July's birthstone is Ruby Sphene .

Ruby can be said to be the representative of red gemstones. It is a gem that has been loved all over the world since ancient times. In fact, it belongs to the same mineral corundum as the striking blue sapphire. Corundum is said to be the second hardest material after diamond, and due to its durable properties, it can be enjoyed as everyday jewelry. The stronger the red and the more vivid the color, the more valuable it is, and the highest quality is called "pigeon blood."

Sphene is a gemstone that is also known for emitting dispersed light (fire) that is stronger than diamond. One of its characteristics is that it is highly pleochroic, showing different hues depending on the viewing angle. Depending on the angle of light, fire and pleochroism can appear at the same time, giving it an enchanting beauty that captivates the viewer.

Karatz GemMagazine
" List of July birthstones and birthstones "

[On sale at 10pm on 11/14] Unheated Mozambique ruby 0.220ct loose Sale price¥25,800

[On sale from 10pm on November 3rd] [Limited to 18 stones] Mozambique ruby (princess cut, 2.3-2.5mm) [Multiple purchase discounts available] Sale price¥3,980

[On sale 11/3 at 22:00] Unheated Ruby 0.330ct Loose AIGS Sale price¥35,800

[On sale 11/2 22:00] Pigeon Blood Ruby 0.280ct Loose AIGS Sale price¥45,800

[On sale 11/2 at 22:00] Burmese ruby 0.418ct loose stone Japan-Germany Sale price¥35,800

[11/2 22:00 Sale] Burmese Unheated Ruby 0.245ct Loose Stone Nikko Kan Sale price¥39,800

[On sale 11/2 at 10pm] Myanmar ruby 0.283ct loose Sale price¥29,800

[On sale 11/2 at 10pm] Burmese ruby 0.239ct loose Sale price¥9,800

[On sale 11/2 at 10pm] Madagascar sphene 6.2mm/0.906ct loose stone Sale price¥12,800

[On sale 11/3 at 22:00] Madagascar sphene 1.386ct loose stone Sale price¥12,800

[On sale 11/3 at 22:00] Madagascar sphene 0.673ct loose stone Sale price¥15,800

[On sale 11/6 at 22:00] Myanmar Trapiche Ruby 0.230ct loose stone Sale price¥18,800

[On sale from 10pm on November 2nd] Limited quantity: Impregnated ruby 1 loose stone (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

[On sale 11/8 at 22:00] Pakistani ruby in quartz 1.429ct loose stone Sale price¥12,800

[On sale at 10pm on 10/30] Ruby 0.284ct loose Sale price¥15,800

[On sale at 10pm on 10/30] Ruby 0.245ct loose Sale price¥11,800

[On sale at 10pm on 10/30] Ruby 0.254ct loose Sale price¥8,800

[On sale at 10pm on 10/30] Ruby 0.273ct loose Sale price¥13,800

[On sale at 10pm on 10/30] Ruby 0.173ct loose Sale price¥12,800

[On sale at 10pm on 10/31] Madagascar sphene 0.483ct loose stone Sale price¥8,800

[On sale at 10pm on 10/31] Ruby 0.248ct loose Sale price¥12,800

[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery Sale price¥6,980

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

1 heart-shaped ruby 2.5mm《Discount available for multiple purchases》 Sale price¥5,980

1 Ruby from Greenland (heart shape, 4mm)《Discount available for multiple purchases》 Sale price¥5,980

Gemstone Encyclopedia Playing Cards + Gemstone Ballpoint Pen Set (Unheated Ruby, Unheated Sapphire, etc.) Sale price¥7,000

{For beginners} Three major precious stone set💎 Ruby, sapphire, emerald 3 stone set {Multiple purchase discounts available} Sale price¥6,980

Limited to 5 sets: Natural ruby & synthetic ruby 2 stone set (heart shape, sorting included) Multiple purchase discounts available Sale price¥5,980

Myanmar Trapiche Ruby 2.6mm/0.125ct Loose Stone Sale price¥5,980

Madagascar sphene 6.506ct loose stone Sale price¥98,000

Madagascar sphene 4.161ct loose stone Sale price¥69,800

Madagascar sphene 2.791ct loose stone Sale price¥98,000

$Limited to 2 stones: 1 sphene stone from Madagascar (rainbow fracture, average 1.45ct) Multiple purchase discount available$

Limited to 2 stones: 1 sphene stone from Madagascar (rainbow fracture, average 1.45ct) Multiple purchase discount available Sale price¥6,980

Madagascar sphene 0.665ct loose stone Sale price¥12,800

Madagascar sphene 0.423ct loose stone Sale price¥6,980

Madagascar sphene 0.597ct loose stone Sale price¥8,800

Madagascar sphene 0.266ct loose stone Sale price¥3,980

Pigeon Blood Ruby 0.40ct Loose AIGS Sale price¥59,800

Pigeon Blood Ruby 0.320ct Loose AIGS Sale price¥69,800

[On sale from 10/25 at 10pm] Pigeon Blood Ruby 0.220ct Loose AIGS Sale price¥45,800

Mozambique Ruby 0.244ct Loose Sale price¥9,800

Mozambique Ruby 0.483ct Loose Sale price¥15,800

Mozambique Ruby 0.226ct Loose Sale price¥8,800

Madagascar sphene 0.823ct loose stone Sale price¥29,800

Madagascar sphene 1.146ct loose stone Sale price¥29,800

Madagascar sphene 0.922ct loose stone Sale price¥25,800

Madagascar sphene 0.838ct loose stone Sale price¥12,800

Sphene 0.452ct loose stone Sale price¥6,980

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments